The really successful religions and eventually empires just happened to be homophobic, so anyone conservative globally is likely to be homophobic.
It's actually a pretty LGBT friendly region anyway, it's legal in most of Indonesia, even, but they border Malaysia where gay stuff gets hard prison time.
Edit: As in, SE Asia is a relatively gay-friendly region, for whatever reason. It's not because social conservatism is out of style.
Indonesia itself is meh. Better than Malaysia, worse than Thailand. And the Muslim part will cane you for it, per the article.