It makes sense when thy engage in political activism or become dissidents. Just because they're skilled doesn't mean they can't be legally causing troubles at the same time.
No country tolerates foreigners moving in and acting against the country that took them in. Well, maybe Germany does.
When you emigrate somewhere on a visa, you're a guest in the country who's tolerated as long as you follow the rules and contribute to society, the moment you start causing trouble with protests or become a nuisance, you're out. Simple.
The moment you try to swing a punch against the government that gave you that visa, then that contract is void, and you're out.
I don't see how this is an issue. Are you OK with foreigners coming into your country and starting to go against your democratically elected government(in principle, not just the orange man specifically)? I don't know anyone who wants that. Let citizens deal with their elected government, you can too once you become a citizen, if you want.
One reason is that it is a check on power.
The protestors and editorial writers were typically not arrested for breaking laws. Typically there are some rules on protests, and when they are not followed then police are free to arrest people.
These people are part of the fabric of free speech that adds value to America. It's messier to live in a country like that, but it stops crazy authoritarian bubbles. I think it's slower at times, but leads to a better outcome.
Many American friends I know don't have the same family history surrounding governments like the Nazis, ussr and CCP. These things are worth protecting, and by the time you realize it -- you're too late.
This is my response you asked for. Does it help ?
Secondly, there's big difference between free speech (as in saying what you want openly), and congregating to occupying public or private spaces to generate protests, be loud, obnoxious, block foot traffic, cause litter, incite to violence etc.
Your speech is free as long as it doesn't inconvenience others. Can I come outside your house, occupy the sidewalk and shout in a bullhorn my political opinions at your window 24/7? No? Why is that? It's just my free speech bro. You see how free speech works?