I was a teenage fundamentalist

There's a stereotypical kind of person who frequents the internet. They're like stock character in fiction (e.g. the wicked stepmother), only they really exist. I recently said to one of them: As I recall, you're one of those dime-a-dozen "I used to be a teenage fundamentalist" who then goes through the "angry young man" phase where he feels the need to tell everyone how he was snookered by those troglodytes, then breathlessly shares his unsolicited insights, which he acquired 15 minutes ago. Maybe in 20 years or so, if you outgrow your juvenile reactionary script, you'll have something useful to say, but forgive me if I don't see you the way you see yourself.