No not homophobic at all but just pissed off that fans take it too far tweeting his girl friend and family hate filled messages about her being a beard and wishing she would die Wouldn't you be a bit angry too!
There is shipping which is harmless then there is taking it to another level which I believe is the case here and nothing to do with homophobia at all!
That's just horrible and nobody deserves that. I still wouldn't be surprised if he officially came out in 5 years time though. Two seperate people have told me independently that having spent time in the company of 1D that it was open with everyone that Louis was gay. But hey, I wasn't there to see or hear it myself so who knows.