Why do you feel uncomfortable with criticizing a mass murdering war criminal?
The dude didn’t hate communism for their values but for belonging to the enemy. He was a Jew but hated his own people (he said he’d gave been an antisemite if he wasn’t born a Jew, with a motivation as asinine as “they must have been doing something wrong to be persecuted for 2000 years”, as if he didn’t know what propaganda was), including ignoring executions of Jews in USSR.
He personally ordered THOUSANDS of bombings in Cambodia and in many many other countries, was responsible for multiple coups and replacing democratic leaders with dictators (this is not something you do if you genuinely belive in democracy over communism), and was an overall monster.