That is hugely annoying, and not just in modern writing, but in life in general. Someone agrees with me on 90% of things, but disagrees with me on this one single important thing? Monster! Hitler! Argh!
That sort of hyperbolic drama queen nonsense, where one side has to demonize the other, rather than point out the validity / superiority of their own side (or work together to find common ground) gets boring. Most of these characters, thanks to years of back and forth characterization between different writers, can be twisted to support almost any position, and you can dig up 'canon' support to back it up. But the second any two characters (or teams, etc.) come into conflict, everything bad they've ever been associated with, even if it was clearly bad writing and has been disavowed/retconned since, gets dredged up and flung like weapons. That said, they are super-people, and writers are hardly encouraged by the fans to write stories in which Cap and Iron Man sit down and discuss how they are going to work together to mitigate the worst potential abuses of a Registration Act, since fan reaction would probably include a lot of 'why does Bendis have everyone sit around and talk all the time, why isn't there more action?'
And so Scott doesn't get to 'talk down' Jean in a victory for love and compassion, instead Xavier has to overreact and turn it into a tragedy. Xavier looks like an ass, in the process, but the narrative requires folks with super-powers to use those super-powers (even on each other) rather than the stuff that makes them human. It's kind of like how super-characters are prone to use their powers on each other violently as a sort of 'warning,' including zaps and blasts or popping claws and waving them around rather than using their words like grownups to diffuse a tense situation. The genre doesn't really call for much in the way of temperance or moderation or thoughtful responses. Even the heroes come across as wanting to solve every problem with fast violence and their biggest weapons (even if their biggest weapon is a mental blast).