Terrywoodenpic
Oldest Heretic
Okay, so I've had time to process this information. What I think is- it'd still be hard to blame Muslims for what UK border authorities decide and is likely a stretch. Perhaps they decided the person had nothing of value to bring into the UK, besides more Britain First style rhetoric.
Certainty a country has the right of sovereignty to forbid entry.
The border force is likely to react in a way that reflects prior information in their data base. Though we are never likely to know what that might be, or which force or agency supplied it. But such stops are never with out some evidence.