Idolatry. 
That's the easiest argument against the Bible. Bible is derivative of the Greek for library. It is a library of scripture, written by prophets; divinely inspired means what? Holy Spirit. Holy Spirit + Bible = overkill. I can't get rid of Holy Spirit - that insanity is permanent - so my NIV went into the trashcan. Oh noes!
Bible without Holy Spirit? Idolatry, trashcan; works for me. How do I know I got Holy Spirit? Observational data. I am a creature of love, morality, faith; most often assumed to be Christian - fucking Phoenix - never assumed to be atheist. Yeah, it's an obvious thing. Any rational human being can use the scientific method to test non-scientific notions and turn an hypothesis into a verified hypothesis. Observation-Hypothesis-Experimentation-Repeatability. Using the subjective laboratory of the mind, all that can be repeated is local to the identity in this case; verified hypothesis is the end of the line, if it can be slapped into sense and sent to an independent laboratory, it might be eligible for theory. There is no need for this idiot to be packing theory of Holy Spirit, even if I could slap some sense into the verified hypothesis.
So the atheist goes, I do not accept that hypothesis; and me and that atheist, we ain't gonna talk about me having Holy Spirit no morez... you know, unless he witnesses a miracle, but I like to keep that shit to a minimum.
As for religion, with the Christian, it is hell. Holy Spirit = no fucking evil, period. They never get that one. Acceptance of the Christ is a fellowship - he ain't supposed to be god - they fluff that one regularly. Faith is a key element of my being, I don't mess with faith unless it happens here on the forums; in person I can tell where the faith begins and the religion ends. Many atheists don't like faith, so I don't argue it; theists often don't even know wtf? Faith? Religion? God?
I don't argue against Judaism. Sometimes I wear the hand of god; one time this guy was telling me it was Islamic, I said Jewish. We agreed it was both. "Easy argument against Judaism?" Don't; that's the easiest one, a flock of wolves right there. Go in there thinking you're shearing sheep, peel back a couple? Call yourself lucky. Try that on a couple of Rabbis, see who ends up with no pelt.
Islam has all kinds of pluses and minuses. A Muslim that doesn't understand Arabic is an obvious target. For a religion of peace, it's dang violent; don't let 'em tell you otherwise. It's straight up with the killing of the infidel. Yet I haven't had a problem with a Muslim; I've had all kinds of problems trying to defend Islam, and that is because of the violence. That seems to be the big minus. The pluses of Islam? It ain't Christianity. It's ripe for an epiphany. If my faith had a religion, it would be Muslim.
What else is there, Baha'i? Happy hippie nonsense.
Buddhism, Hindu, Tao? All of 'em are fine as a philosophy. Haven't heard any bs about Taoism; those other two get religious and go to war. There's a weak point.
Shinto? Ancestor worship, what I understand of it; might not be understandable. Not a problem.
Scientology? Wood chipper.
I think that covers it...

That's the easiest argument against the Bible. Bible is derivative of the Greek for library. It is a library of scripture, written by prophets; divinely inspired means what? Holy Spirit. Holy Spirit + Bible = overkill. I can't get rid of Holy Spirit - that insanity is permanent - so my NIV went into the trashcan. Oh noes!

Bible without Holy Spirit? Idolatry, trashcan; works for me. How do I know I got Holy Spirit? Observational data. I am a creature of love, morality, faith; most often assumed to be Christian - fucking Phoenix - never assumed to be atheist. Yeah, it's an obvious thing. Any rational human being can use the scientific method to test non-scientific notions and turn an hypothesis into a verified hypothesis. Observation-Hypothesis-Experimentation-Repeatability. Using the subjective laboratory of the mind, all that can be repeated is local to the identity in this case; verified hypothesis is the end of the line, if it can be slapped into sense and sent to an independent laboratory, it might be eligible for theory. There is no need for this idiot to be packing theory of Holy Spirit, even if I could slap some sense into the verified hypothesis.
So the atheist goes, I do not accept that hypothesis; and me and that atheist, we ain't gonna talk about me having Holy Spirit no morez... you know, unless he witnesses a miracle, but I like to keep that shit to a minimum.

As for religion, with the Christian, it is hell. Holy Spirit = no fucking evil, period. They never get that one. Acceptance of the Christ is a fellowship - he ain't supposed to be god - they fluff that one regularly. Faith is a key element of my being, I don't mess with faith unless it happens here on the forums; in person I can tell where the faith begins and the religion ends. Many atheists don't like faith, so I don't argue it; theists often don't even know wtf? Faith? Religion? God?

I don't argue against Judaism. Sometimes I wear the hand of god; one time this guy was telling me it was Islamic, I said Jewish. We agreed it was both. "Easy argument against Judaism?" Don't; that's the easiest one, a flock of wolves right there. Go in there thinking you're shearing sheep, peel back a couple? Call yourself lucky. Try that on a couple of Rabbis, see who ends up with no pelt.

Islam has all kinds of pluses and minuses. A Muslim that doesn't understand Arabic is an obvious target. For a religion of peace, it's dang violent; don't let 'em tell you otherwise. It's straight up with the killing of the infidel. Yet I haven't had a problem with a Muslim; I've had all kinds of problems trying to defend Islam, and that is because of the violence. That seems to be the big minus. The pluses of Islam? It ain't Christianity. It's ripe for an epiphany. If my faith had a religion, it would be Muslim.
What else is there, Baha'i? Happy hippie nonsense.
Buddhism, Hindu, Tao? All of 'em are fine as a philosophy. Haven't heard any bs about Taoism; those other two get religious and go to war. There's a weak point.
Shinto? Ancestor worship, what I understand of it; might not be understandable. Not a problem.
Scientology? Wood chipper.
I think that covers it...