I actually interpreted the last bit as "I write these pairings because I like them - even though I think they're less accepted", but maybe I'm being too generous? (Also, do people really get "enraged" about less popular pairings being written? I find it hard to imagine, but I'm not active in the HP or Naruto fandoms, so...)
You're right, though, the rest is very aggressive and stompy and offputting, and I don't really understand his "good pairings" thing, which seems to suggest that only pairings he likes can be Right and Good. I agree with sarah_frost that, uh, why couldn't he just put "I like rarepair het, so that's what I write" instead of all the "GOOD PAIRING" and "this might anger and enrage some people, I am such a daring edgy rebel" stuff?
FInally, his phonemic transcription (if that's what he was going for) is messed up. What he wants to say is something along the lines of /gυd pәerιŋ/.