That’s the stuff I can’t understand...how can churches and religious belief matter so much, that governments (and the resulting death and wars), become governing bodies? Seems to me, that one’s belief in God should just be an individual thing.
I'm not sure why you can think beliefs don't or shouldn't matter.
Everyone's worldview results in a way of doing things and these are funnelled into political movements. This is true whether you are atheist, christian, muslim, hindu, or have the environment as your God. An example...you can see how the green movement has tried to usurp the power of everyone else by squelching the fossil fuel business, thereby destroying prosperity for all of us. Or how the homosexuals are trying to get power in the school system now.
Why would you think people who believe this actions are wrong should stand down, not fight back or keep it to themselves?