I get the first two (they're basically drastic mispronunciations of foreign words), but the third one, I don't get.

No. There are kinds of leftism that aren't communism.

All communists are leftist, not all leftists are communist.
Much like how all fascists are rightist, not all rightists are fascist.

Your comment is random.

It's because Germany's allies were crappier than Russia, and America joined with Britain and France.
Honestly, Germany, given that they had the worst possible allies, did quite well. Better than the Brits.