>Attractive Woman: exists
>Japanese Men: If she gets a bf I'm going to bomb her house
What is the source of this behavior?

Remember when the West went into such severe economic crisis that normal people couldn't get jobs/start families/etc and stayed in perpetual childhood? And then retarded entitled normalfags who wanted to be successful but couldn't started flooding english otaku hikki/NEET spaces and became the default over the original ones who actually wanted to like their hobbies? Okay well Japan has been like that for 20 years...