Individual communists [...] want government power to take your stuff.

And how do you think they're going to actually do that? Show up at my door and ask nicely? No, they're going to show up with guns and when I don't comply they're going to shoot me and my family. And they know this.

And let's be perfectly clear; this principle doesn't just apply to communists. Anyone that says "I want the government to enforce X" wants the government to shoot you if you don't comply with the enforcement of X.