A number of people do refer to it disparagingly as “land communism.” (Especially those on the California property ladder.)
I just think it’s better than other forms of taxation. I don’t see why I should need to report my income or employment to the government, nor do I see why I should be taxed on my labor. To me this is much less justifiable (and much more invasive) than just taxing land.
Why do you “own” land? Who first owned it to have the right to sell it? Usually land ownership claims eventually go back to violent conquest. Why did the conqueror who stole it have the right to sell it? Why should we treat the claims that descended from this as inviolate?