My view and reasons for them. Atheist and Christians welcome here. (short)

[Quick]

Because thinking something is true and believing something is true are not the same thing

I agree with this but I disagree that you do not have beliefs. My last therapist said it took him 7 years to figure out that there is an interweaving between our beliefs, thoughts, emotions, and behaviors. I believe him since the study of the mind is his profession. he was a very happy individual as well.

You not understanding how I can not believe in God is both an argument from emotion and from ignorance

No, it's not that I don't understand how you can not believe in God, it's that you say you don't believe in God and consider yourself agnostic, which as stated in this thread is a neutral stance towards believing in a God that basically says "IDK if I believe in God or not" (at least this is what it is for me) You are not saying you don't know if you don't believe in God or not, but stating that you don't believe in God.

I do not believe because there is no evidence for his existence and so the default position for me is atheism

I think I understand what you are saying. You are saying you don't believe in god because there is no evidence but that if there was evidence for believing in God that that would change your outlook. This is a very rational approach to deciding whether you believe in God or not. Given everything you have said about your approach to the God conundrum, I think your stance is probably the best reason I have ever heard for someone taking the stance of being an atheist (which I am sure is much more common than I have experience with). Ofc, I don't want to put words in your mouth so if I have this wrong, please clarify that for me.

My understanding of why an atheist doesn't believe in God is because they want to go against organized religion as a matter of principle and that this is what informs their belief system.