That's one of three I have on my car, the others being:
"At least the war on the environment is going well"
"Don't pray in my school, I won't think in your church"
I haven't yet seen:
"If you want to live in a theocracy, move to Iran"
Of course from 1968, I had on VW van "Vietnam - Love It or Leave It". Got people's attention even in Los Angeles,CA.