I've always wondered that too, why homosexuality (which I will never understand, actually) is the biggest thing that Christians rally against. I personally knew a straight man who committed suicide, leaving behind two teen boys! And there are many straight young parents who kill themselves, leaving behind devastated children and their own parents. Yet Christians never rally against the concept of suicide -- which leaves an enormous and permanent wake of destruction for multiple people. Few acts are more reprehensible. I also never hear of Christians rallying against child beaters and wife beaters and animal abusers--all far more heinous than loving someone of the same sex.