I think its the confidence you get from having found one thing you got right and now a bunch of people rally around that and then treating it like its the world upon high and everyone else is a sinner
Bitcoin attracts all kinds and people are flawed, a lot of people are desperate and need something to hold onto, and Bitcoin has become their religion and their identity
I wouldn't pay too much attention to these people, while they are vocal, they're hardly constructive to talk to and very few of them are going to provide you with much value.