Books

This and Homage are his two best imo. His fiction is a little too on the nose and heavy handed.

couldn’t help to find Hitler unlikable

I think you meant, to quote Orwell himself:

I should like to put it on record that I have never been able to dislike Hitler.

More on the list in question: https://en.wikipedia.org/wiki/Orwell%27s_list

There is a notable and obvious overlap in Orwell’s notebook between many of 1940s London’s prominent gay, Jewish and anti-colonial public figures and the accused “cryptos.” Orwell’s bigoted commentaries fill his suspects notebook. Jews are clearly labeled (“Polish Jew,” “English Jew,” “Jewess”) whilst others were mislabeled (“Charlie Chaplin — Jewish?”). The African-American bass singer and future civil rights activist Paul Robeson finds himself in Orwell’s list with the note “very anti-white,” whilst the half-Jewish poet Stephen Spender is damned as a “sentimental sympathiser… tendency towards homosexuality.”

It'll always be funny that the dude who wrote something like 1984 was such an eager proto-McCarthyite snitch for the propaganda unit of the British Foreign Office.

I would have thought finding Hitler unlikeable would be a positive attribute ? Was that a typo ?

Orwell was a socialist so making lists of leftists seems surprising; are you sure this wasn't an ideological tankies vs socialists or marxists vs trotskyists ?