Don't Be Anti Car. Be Pro Something Else.
The thing is, most of the cycling advocacy I see is <i>pro solution</i> yet the opposition response is largely <i>anti problem</i>.  Those who want to ride safely typically propose infrastructure based solutions and rarely treat the automobile itself as the problem.  For example: while you may see advocacy for protected lanes or traffic calming, almost no one is arguing that cars should be removed from the roads.  Contrast that to the opposition response, which often seeks to have bikes removed from the roads and never supports accommodation for different modes of transportation.