Hello, i am a real Christian

[Atheist_named_Christian]

-many atheists have a presumption that any belief is wrong, and will only look at a belief starting with that presumption.

No, you've got that all wrong. It's called burden of proof . If you make a claim, you must back it up with sufficient evidence before we accept the claim. If we do not accept the claim that does not mean we think the opposite is true. This is one of the first rules of logic that you should learn if you really want to debate with us. You are making the claim that God and Jesus exist. You have failed to provide evidence of Jesus, you referenced the Gospels, that's it. But lookie here, I've already given a brief summary of why the Gospels are not sufficient evidence for Jesus.

Also you really might benefit from this video, which gives a basic break down of burden of proof, logical arguments, and how lacking a belief doesn't not equal asserting that belief is untrue

I do not overgeneralize. I deliberately use the term "many atheists" to say that i sont think ALL atheists or the VAST MAJORITY of atheists are a certain way.

I do not mean the burden of proof. I mean that many atheists have the exact same behavior as fundamentalist christians: when they see a theist saying something, theur first instinct is to say it is wrong. And even when it makes sense, they would rather prove it wrong with bad logic than agree with it.

I think you already started out wrongly, as we do not have the presumption that belief is bad. According to my dictionary, a presumption is "an act or instance of taking something to be true or adopting a particular attitude toward something, esp. at the start of a chain of argument or action". As most atheists (or their ancestors) were believers one day, we all started out at with the presumption that god exists (we were raised in this believe!). I came to the conclusion that there is no god through reason and logic - therefore, that I consider god dead is a conclusion, not a presumption.
And what you describe is called antitheism, by the way, not atheism. Atheism means you do not believe in a god but you can still consider believe right or wrong. I am, however, both.