They already did

Those phrases are so vague it would be hard to prove they are reasonably only associated with PA, not to mention that they predate Palestine Action even existing

This is simply not true. You could be jailed for openly and publicly supporting Palestine Action specifically, but you can support Palestine and speak out about genocide as much as you like.

Not bullshit, he was refused an audience the day before, which is what this article is referring to

Someone who is clearly unaware of the use of margarine in baking

A person can be British, in which case they are a Briton