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.
Whataboutism is awesome for the empire. Incidents that happened 40-90 years ago can be equivocated with current empire abuses, and rulers protecting their nations from Empire's "democracy" manipulations meant to destroy those nations can be demonized as less perfect than the utopia of western democracy illusions.
Liberalist freedom or constructive anarchy is only a possibility if US empire is not intent on destroying you.