Memes

If Stalin was in Obama's shoes, we'd have had free healthcare, an end to homelessness, the end of the US Empire, and the adoption of a socialist economy. I don't know what you are specifically referring to when saying Stalin "killed millions," if you're blaming Stalin for famine then you should also laud him for the fact that life expectancies doubled following the collectivization of agriculture and an end to famine:

If you mean the purges, the number sentenced to death was in the 700,000s, not millions, and the total number of executions carried out was significantly lower. Further, there was absolutely conspiracy against the socialist state in the USSR, they didn't just randomly execute people. If you mean the Nazis killed during World War II, then this was a good thing.

Obama continued US imperialism, and destroyed countries like Libya for corporate profit while the working classes suffered. Stalin would have been much better.

where do you get these millions?

genuinely asking

You could have just said you don't understand the difference between defending a socialist revolution and capitalist wars of Imperialism. The demonstration wasn't necessary.