3 reasons for Christians to start questionng their faith

[Esquilax]

2. I somewhat agree. Your definition of morality is, "the pursuit of accomplishing a logical and beneficial objective", so without a God you can have Utilitarianism, but you've lost all reason to hold to Altruism, and Altruism is the basis of Christian morality. Utilitarianism also doesn't always hold to what is beneficial for all. Instead, it wants what is beneficial for most. Therefore, if there are too many old people eating up resources, we should just kill them (THIS ISN'T TROLLING! PHILOSOPHERS ACTUALLY CONSIDER THIS!). Same applies to babies, even after birth (Austrialian Philosophers this time...)

To say the least, I prefer Altruism.

Dude, it kinda feels like trolling. You've taken an extreme position and tried to link it to atheism, but I'll give you the benefit of the doubt. Who says we need to conform to the standard of utilitarianism? There's no atheist rulebook, you know. We each develop our own moral standards, but before we get to the accusations of subjective morality, I'll mention that there are some objective standards that we all tend to conform to, developed through empathy and such. One of those is that life is preferable to death, because as far as we know there's only one life available and death provides nothing.

... So, no killing old people and babies, no.