I wonder if Araujo had been mistaken for a hot chic and was making out with "one of the guys"? Not saying that it would justify a lethal beating, but I could see why someone might get upset if they just found out that they were swapping spit with another man...
There was no mistakenly about it and it's been reported that it went well beyond 'swapping spit'. The guy was passing himself off as a girl and, from pictures, I'd say he was quite convincing. He was a transvestite, not transgendered.