He was being a bad person the moment he thought "I hope she gets abused by her boyfriend." No need to do research on the guy after that point.
That said, he'd only saying that because hes incredibly close to being depressed and in extreme self loathing in response to being rejected and trying to protect his his will to live via delusional projection and lashing out. "She's the one with a problem not me. I'm great. She's a piece of shit and deserves to suffer."
People who don't delude themselves about how great they are unfortunately usually don't respond to rejection with "I need to improve myself" or "I'm just not his/her type I'll find someone." but with "I should kill myself, its hopeless. I'll be romantically alone forever and I can't take it." and the sheer mortal terror of potentially thinking that way causes the delusional insulation and projection.
Its not a philosophy, its a position on the existence of god.
Its simple because its only a statement of belief in no god in the form of identification. A historical perspective is not needed to come to a conclusion as to whether people who believe in god are stupid or smart. You can also do that through thinking about their rationality or logical process for coming to those conclusions.
If I wrote a philosophy or theology about how everything is made of bananas, and then for hundreds/thousands of years people argued about the nuances of my absurd and baseless belief system I think it'd be fair to dismiss it anyway. It doesn't matter how much fan fiction is written about Musaceae-ology. You don't have to read it, you can safely ignore it.