Bumper Sticker Road Rage

Have you ever been driving down the road and coming up to a busy intersection and nicely slow down to let someone out in front of you? Yes, this is a nice gesture and I find myself doing it often. Recently I've had the misfortune of letting ignorant people out in front of me! Being the nice person I am, I slow down and wave the person out in front of me and then "BAM" there it is in my face, a dumb ass bumper sticker. There are several of these that piss me off the 2 most offensive of which are man + woman = marriage and "Guns don't kill people, Abortion kills people." I get very angry when I have gone out of my way to be nice to someone and they have that kind of shit on the back of their car. Please let me live my naive life thinking that everyone is accepting and understanding of others! I mean I really feel like speeding up and ramming the shit out of their car to see how many times of rear ending them it will take for that sticker to come flying off!