I wasn't making fun of Judeo-Christian ethics. I was pointing to a fact about those religions, and frankly, you could add Islam to the same mix -- They say that Homosexuality is a sin, the exact wording in Leviticus is "abomination". Since most in America and other western countries are familiar with the edicts of these religions, they're less inclined to speak out against such discrimination.
If you were raised in a country where pork-eating was considered an abomination, then you could reasonably expect to get some flak for eating a ham sandwich. It's human nature. If something another group does runs counter to what the majority believe in, then you will see them mocked or worse. The nail that sticks out must be hammered flat, as the saying goes.
And as for Christian oppression, well, I personally find some of their examples rather lacking. Saying Holiday Tree or Happy Holidays is not discrimination. In fact, most nonchristian holidays are scarcly mentioned. No American Hindu expects to hear Happy Dawali outside of his temple. No pagan expects the mainstream culture to recognize Yule or Samhein (btw, Samhein is a harvest festival, not a pagan god), no Buddhist expects to open a western calendar and see a mention of Obon or Buddha's Birthday.