You're a racist.

The way to tell between that and factual / culturally-fluent: were you able to any strengths of other cultures? Weaknesses of your own?

Or did you go off on an (in this case ill-informed) rant about "they bad"?

The way to cure it is a mixture of reading: business books on culture (like Meyer and Hofstede) and NATO ones. Those are places people need to work together, as opposed to woke ideology.

Then, application. Travel is good here.