"In 1938 Hitler's doctors put him on a meat-free diet, and his public image as a vegetarian and a lover of animals was fostered; from 1942 he described himself as a vegetarian. " - https://en.wikipedia.org/wiki/Adolf_Hitler_and_vegetarianism

In Politics, it seems to have been a right-wing thing at some point at least. It is a left-wing thing today, though. The right in germany is famously obsessed with meat (Markus Soeder; Alice Weidel; etc.): "Ich lasse mir nicht mein Schnitzel wegnehmen" - Alice Weidel ("I'm not going to let Schnitzel be taken from me") It's one of the larger points they hammer away at in their culture war against the greens.

Animal Liberation has been used by all manner of people in politics before, irrespective of their political orientation - I don't think it's purely Right Wing or Left Wing - though it's very much a left wing thing today.

Many "animal liberators" are explicitly racist and classist to other humans. Guess it doesn*t matter when the species of the oppressed animal is from the Hominidae family

"animal liberation" tell, have you released any pets into the wild?