It's not just Trekkies who are like this. I've seen it a lot with Whovians and other fan groups.
After seeing it for years in Doctor Who fandom but never getting it, as much as l loathed Enterprise with a passion at the time, I was at least greatful for that - it allowed me to understand how fans could become bashers.
Dunno if that's operative so much these days. We live in an age where it's far easier to compare the New Thing with the Old Thing side-by-side in the cold light of day than it's ever been.
So in other words nostalgia isn't as good as it used to be.