You are right that protecting the sanctity of marriage is more right than protecting muslims (and thus more likely to earn the left's ire). Both islam and leftists see each other as tools. The Left (or islam: see the 3 sister prophets or its 2 possible conspiracy theories to explain away the Ressurection) doesn't claim to be for consistency.

As far as your evidence, you've got a troll subreddit for Indians and a short reply in a foreign language. Although it should have been moderated away, that's exactly the kind of thing that will slip through the cracks. The third link is a bit more substantial. You've got a gay guy (pedo) who wants to have some girl's father as a sex slave. Although he doesn't back down from his gay/pedo stance, I find the whole thread a bit like bait. Do you really believe a seven year old has a twitter account in a war zone? Of course not; don't feed the (muslim) trolls. Most seven year olds are just starting to read.