there is no ‘right to enter America’ and fwiw i seem to recall that the UK has a bad habit of banning American musicians for the content of their songs.
seems like a reciprocal relationship to me. i'd also say the recent US stances are an aberration whereas the history of UK immigration policy is a better reflection of core governing principles.
https://www.reuters.com/business/media-telecom/us-visa-polic...