It can be difficult period. Why should any country take immigrants your country doesn’t want for any reason?
And “terrorist supporter” could be a very broad category. Are you a terrorist supporter if you support resistance against Israeli troops in Gaza? Because Israel and some of its allies would say yes.
I admit, it’s pretty cool to do things like walk down the street in London and look down at a manhole cover and see that it has the date imprinted on it and has been there since the start of the industrial revolution.