[(Edited) to add quote
Namitynamename · Today 19:06
Just to clarify Hamas for example would be considered a terrorist organisation under UK law and I dont think most people would have a problem with the police arresting people for holding up signs explicitly supporting Hamas. Likewise there are far right terrorist groups you are not legally allowed to support. But extending that definition to include groups like Palestine Action blurs the boundary far too much. In the long run it undermines the governments ability to deal with actual terrorist/dangerous groups- but boy who cried wolf.
When Palestine Action damaged the plane there wasn't much free speech law to test- it's very clearly criminal damage (arguably as a means of peaceful protest but clearly against the law). When people break the law by holding up signs supporting Palestine Action they very clearly are testing the boundaries of laws around free speech. ]
"arguably as a means of peaceful protest but clearly against the law"
No
peaceful is not breaking into a UK military site and damaging UK property.
peaceful is not damaging any public property.
peaceful is not damaging private property.
The organisation may have only reached the bottom rung of what may or may not be a terrorist act. They carried out a political act per 2(b) and the Courts ruled that it met the definition:
Terrorism: interpretation.
(1)In this Act “terrorism” means the use or threat of action where—
(a)the action falls within subsection (2),
(b)the use or threat is designed to influence the government F1or an international governmental organisation] or to intimidate the public or a section of the public, and
(c)the use or threat is made for the purpose of advancing a political, religious F2, racial] or ideological cause.
(2)Action falls within this subsection if it—
(a)involves serious violence against a person,
(b)involves serious damage to property,
(c)endangers a person’s life, other than that of the person committing the action,
(d)creates a serious risk to the health or safety of the public or a section of the public, or
(e)is designed seriously to interfere with or seriously to disrupt an electronic system.
(3)The use or threat of action falling within subsection (2) which involves the use of firearms or explosives is terrorism whether or not subsection (1)(b) is satisfied.
(4)In this section—
(a)“action” includes action outside the United Kingdom,
(b)a reference to any person or to property is a reference to any person, or to property, wherever situated,
(c)a reference to the public includes a reference to the public of a country other than the United Kingdom, and
(d)“the government” means the government of the United Kingdom, of a Part of the United Kingdom or of a country other than the United Kingdom.
(5)In this Act a reference to action taken for the purposes of terrorism includes a reference to action taken for the benefit of a proscribed organisation.
That is very different to holding a sign or wearing a T with a message about a faith belief