It’s political in so far as it’s a Government decision, it’s not a ‘punishment’ against the politics of the UK as some are alluding to. Opening v Closing isn’t like with like, yes the UK is France’s biggest inbound tourist market but tourism is a much smaller part of France’s economy than it is in the likes of Croatia, Greece, Portugal, Spain. Therefore Austria, France, Germany can better afford not to take the risks associated with letting in UK travellers.