It's important to remember that the headline refers to the group Palestine action, which has carried out vandalisation of historical pieces, occupations of property, destruction etc (see here). So it's a group that fits the UK definition of an extremist group.

Some political groups (or even branches of them) can be political cults trapping members with coercive control It's not always idealistic well meaning people. The court that decreed them an unlawful group will have seen a lot of info we didn't.

I think we need to look deeper than the headline

15 minutes to go! If you're gonna say it, be quick!

They can take it to EU court. oops haha. This is why the elites pushed for Brexit. It wasn’t just to repatriate their money from Cayman Islands tax free. It’s so they can suppress anyone that doesn’t bend the knee.

I was following this and was sad to hear about this happening despite excellent counterarguments from people like Zarah Sultana. These are scary times, but I was encouraged there was at least this response yesterday (just watch the first ~45 seconds): Invidious | ~Youtube~

Well. You'll just have to write it somewhere. In paint perhaps. Maybe on a government building.

Does free speech or democracy exist if the oligarchs/states that buy your politicians/rulers force you to support those states? What would Idi Amin do (perhaps most self enriching open corrupt ruler, or the narrative that gets pinned on a ruler who shifts away from US empire)? Or as in history, UK first decided it was illegal to oppose Idi Amin (support his rivals) to later being illegal to support Idi Amin?

"To know who rules over you, notice who you are not allowed to criticize"

IIUC, it is only Palestine support that is illegal. You may still advocate for UK/NATO war on Israel or at least elimination of support, and elimination of politicians who support Israel. Limiting speech to support for all wars your rulers prefer is the most oppressive of democratic speech.