Ask Lemmygrad

Allegedly, Yugoslavia murdered Soviet and classical Marxist-Leninist-aligned politicians.

If true (about Soviet politicians) then it's part of the tit-for-tat between Yugoslavia and Soviet Union. Yugoslavia was run by Marxists, I'd dare even say Marxists-Leninists, their problems with the Soviet Union were not ideological, but political.

Soviet documents showed that the Soviet Union was paying for anti-Yugoslav activities in Yugoslavia all up until 1979. Then there's also the case where the Soviet Union would arm Yugoslavian dissidents and then send them across the Bulgarian and Hungarian borders to attack the border posts. A Soviet general remarked that after the 50s all Soviet battle plans had to do with Yugoslavia's terrain. Stalin famously said "I will wag my little finger and Tito will be gone." There were dozens if not hundreds of attempts on Tito's life, mostly from the Soviet Union.

In popular culture, especially western popular culture, they like to lump Yugoslavia as part of the "communist bloc" but don't know that Yugoslavia and Soviet Union were practically enemies from like 1949 until the 1970s. One of the catalysts was that the Soviet Union made a deal with Britain where they wouldn't arm Greek communists, but Yugoslavia went against "official communist policy" and armed them anyway.

Yugoslavia and Tito did make some mistakes, that's for sure. But I'll say one thing, that whatever Tito & Co. did, they did it not to enrich themselves, but for the people of Yugoslavia. That's why Tito played both sides and on the world stage Yugoslavia always did what's right, not expedient.

Tito supported the Soviet invasion of Hungary in 1956 but criticized Moscow’s intervention in Czechoslovakia in 1968. Tito’s denunciation of that move further warmed relations with Washington. But they cooled again when he sided with the Soviets during the 1973 Arab-Israeli conflict.