Here is the original YouGov poll that UnHerd commenting on:
https://yougov.co.uk/politics/articles/51086-which-political-ideologies-do-britons-have-a-positive-view-of
More food for thought, from what YouGov say:
“Among Labour, Lib Dem and Green voters, environmentalism (74-83%) and feminism (68-80%) are the overall most favourably viewed ideologies. Additionally, over six in ten Labour and Green voters (62-63%), as well as half of Lib Dems (49%), see socialism positively, while 64% of Lib Dems, 56% of Labour voters and 47% of Green voters are favourable towards liberalism.
(. . .)
Most likely to be approving of far-left ideologies are Green voters, with three in ten (31%) having a positive opinion of communism and a quarter (25%) looking at anarchism favourably. While one in seven Labour voters (14%) also have a positive view of communism, this is less than the 23% with such an opinion of capitalism.”