Nitpick, but "leftist" doesn't mean what you think it means.
"My country is great and it deserves to do what it wants to do!" doesn't suddenly become "leftist" just because the person saying it is from a different country.
Well, in that case, "leftist" does not mean what you think it means.
Protectionism is an ancient concept, and espoused by various leaders from all across the political spectrum. As I said, it doesn't suddenly become "leftist" because it's espoused by Xi Jinping instead of Donald Trump.
"My country is great and it deserves to do what it wants to do!" doesn't suddenly become "leftist" just because the person saying it is from a different country.