Palestine Action is in good company. British governments and courts criminalised resistance to slavery, the Chartist movement for universal male suffrage, any organising by trade unionists, and the Suffragette movement to win women the vote.
None of our rights were given to us by the ruling class. We had to fight for each of them tooth and nail.
The British establishment is always on the wrong side of history, because history is with the struggle of ordinary people, not with the selfish interests of the billionaires and war industries.
Those earlier struggles were deemed the terrorism of their day by the very same "liberals" – the British establishment and its useful idiots – who today declare any practical action to stop British complicity in Israel's genocide to be terrorism.
Note too as proof of bad faith: the British establishment is well advanced in its efforts to declare entirely peaceful protest – marches through the streets – as anti-social, hate crimes and soon enough terrorism too.
The ruling class consider attempts to stop a genocide, even holding a banner against the mass murder of children, to be far worse than racist pogroms in Belfast, which try to burn alive people in their homes because of the colour of their skin.