Anyway, you are absolutely correct. They have used religion to spread hate and ignorance. It's been done forever and will continue to be done, no doubt.
As it is unlikely that I will ever be elected into a position of great power, I have come to realize that we each have to change the world in the ways that we can. This involves small, sometimes symbolic, actions. The important thing is to use them when we have the opportunity.
Like voting or registering people to vote. Like taking stand with bigots or bullies of all stripes whenever one encounters them. And, yes, by putting up images, bumper stickers or icons that support the civil liberties of other humans.