The UK is part of 5 Eyes. They swap info on citizens among members. No warrants, no constitutional protections. All they have to do is ask MI5 for info on Americans with dual citizenship.
That stretch of logic sounds an awful lot, like a post-hoc justification after learning it wasn’t about the US. But ok
One of my in-laws has dual England/US citizenship. They divide their time between the two countries. It directly effects them.
No no no, he’s just american and thinks the universe centers around the US