Nothing "trumps" civil rights (fyi - marriage equality is a civil rights issue)
It seems to me that fearfulness grows from a perception of incapability/incapacity to cope with a threat. The evidence that same-sex commitments present no threat to civil society cannot, nevertheless, be denied. By the way, aren't the Levitical priests (Leviticus) the one's who surrendered Christ to Pilot because of the heresy he was accused of preaching (love)? I find the fear and loathing (rather than compassion and joy) that characterizes the opposition to equity of civil marriages disappointing. I believe that the love-sect (Christianity) that extends to gentiles (like me) with very different traditions teaches me God's grace extends to individual sinners (regardless of our social fellowships) and that our affinity as human beings is irrevocable. I argue that the American separation of 'religious' sentiments (and rites) from secular judgments (and rights) should be respected (church from state). If it does not strike you telling that the similarity of arguments against civil rights regardless of sexual orientation and the arguments that were used against civil rights regardless of race then the obvious must often escape you.