I didn't notice it right away. I actually had to google the seven deadly sins to figure them all out. And even then, I could just barely relate his post to pride, so... *shhh*
His points just weren't making any sense... and it was easy to see that he just hasn't been exposed to a gay/lesbian community, and doesn't know how to deal with it. So, he does what he sees being done around him; discriminates.