Kudos for having the honesty to rationally face your assumptions/beliefs and allow reality to be your guide.
If more people on so-called extreme political or social sides were willing to perform honest analysis of their beliefs, I truly believe we would find more commonality (as you have) and co-exist more constructively.
It's a long journey. As an aside, I think you'll find an interesting shift in one particular belief of yours as you get older, especially since you are clearly a thinker and follow some variant of the scientific process. I think you'll one day be surprised to find how compelling the existence of a supreme being actually is. I'm not speaking of the God of the Bible, Torah, Koran, or anything else. Personally I think the fundamental nature of mankind gets in the way of whatever good parts those belief systems may have. Nevertheless, there is a cosmic order and synchronicities in our lives that, over time, defy pure chance.
I encourage you to continue your search for truth, and to always be as honest with yourself as you can be during that search.
Safe travels.