Converts do tend to romanticize their new side over the old one. But I think Larry's view has specific alignment with history: at the time, the most outspoken on the websites he visited were strongly Atheistic or Anti-Religious. That sentiment prevailed in websites like Reddit which, for example, had /r/atheism and its "euphoria".

StarSlateCodex describes this phenomena in detail, as well as what happened to the more drama-prone Atheists who Larry probably tussled with: https://slatestarcodex.com/2019/10/30/new-atheism-the-godles...