Orwell was an orthodox communist who was in favor of communist oppression of all non-socialists. He was only opposed to the oppression of socialists or other communists by communists. So how did Orwell come to be thought of as a conservative? He wasn’t even a democratic socialist if you consider he didn’t regard capitalists, property owners or clergymen to have any rights, including the right not to be killed.
The Soviet leadership demanded that all socialists join with them and submit to their discipline as part of the war on fascism. Essentially all, including all American liberals, agreed to and submitte to this demand. Orwell always opposed Stalinism from the left- he regarded it as state capitalism. This didn’t matter- he had committed the unpardonable sin of not cooperating with the Soviets and thus had to be labeled a secret fascist, which is the Stalinist way of dealing with any dissent. The whole Western left became Stalinist through this process, and we live in a Stalinist society today, just a milder and more effective version of it.