No need, I have read the comic you are referring to. I probably worded it incorrectly in the first place to be honest. The point that I was trying to get across was that he might have had a desire in a particular person (Which is most likely because of the long time relationship with his boyfriend) and by doing that he became a part of a culture that he didn't believe in. It's even evidenced in his outspoken-ness for the cause. The enthusiasm is directly related to the belief in the cause. Since he was trying to convince himself that he was a part of it, he tried harder than those who were actually a part of it. This also is shown by his change in beliefs. His tenaciousness is unchanged, it's just the idea that he is trying to convince him self of is what's changed. He's still as outspoken as ever, but for a different idea. Much like the writer of the article, I am not phased by his life style change, I am disturbed by his anger towards the group that he once defended.
I don't think he came across as angry so much as he came across as having a ton of baggage. Which makes a lot of sense, all things considered. He changed his stance on a HUGE amount of his life, and was dealing with how his old life saw the change. It's never fun to feel like you aren't supported by those you once called friends, and that's probably how this bloke feels. Figuring out where your faith fits in with the rest of your life (or vica-versa, I guess) is an extremely difficult task that every Christian, heck, every religious individual, has to come to terms with. This guy is new in his faith, and he's already dealing with all of the baggage that comes with it. It's understandable if he's a bit standoffish, he'll grow.