Let's bracket the "was the USSR in the right?" question, and let's ask the "how brutal was the Soviet clampdown on these two uprisings?"

• 1956 Hungary: 2000-3000 killed by the USSR
• 1968 Prague: 137 killed by the USSR

How does this compare to clampdowns by NATO countries (excluding the US)?

• Indonesian National Revolution against the Dutch: 100 000 Indonesians killed by the Dutch

• Algerian War of Independence: 250 000 killed by the French (French estimate) - 1.5 Million (Algerian estimate)

• French War against Vietnamese Independence: 200 000 dead

• Portuguese Colonial Wars: 70,000–110,000 civilians killed by Portugal

• Mau Mau Uprising against the UK: "Officially the number of Mau Mau and other rebels killed was 11,000, including 1,090 convicts hanged by the British administration. The Kenya Human Rights Commission has said 90,000 Kenyans were executed, tortured or maimed during the crackdown, and 160,000 were detained in appalling conditions. "

This is a non-exhaustive list with estimates. The actual brutality is not conveyed. The war crimes are often comparable to the Waffen SS.
You get the idea: the colonial powers were incomparably worse.

The use of the word "tankie" these days is so over-used it has become synonymous with "left of the DNC." I've even seen Anarchists described as "tankies," it's getting ridiculous. Still, the word "tankie" is most often used by liberals against Marxists, though they won't admit to having an anti-Marxist bias, mostly because they think they agree with Marx generally but are unfamiliar with Marxist analysis.

Really, more people need to read theory before having an opinion on it to avoid speaking past each other. I wrote an introductory reading list for Marxism-Leninism if anyone wants to get a better understanding of Marxism.

The biggest irony of our times is blood thirsty liberals who are cheering for as much war as possible running around calling people tankies.

nowadays tankie just means someone who shills for china/russia with a communist background

If you don't have an opinion on it, you might when you learn the fascists were putting chalk marks on the doors of communists and jews

For context: these are the original lines

I have actually found the “tankie” moniker to be useful IRL:

Tell someone you’re a Marxist-Leninist and you just get a blank stare.

Tell someone you’re a socialist and they think you mean you’re simpatico with AOC and Bernie.

Tell someone you’re a communist and they will just shut down and not hear anything else you say.

But “tankie” seems to convey enough truth - that you support past and current efforts from AES states to build socialism - to be useful.