> I didn't personally buy the classes and saw it as a generalization and racist (unsurprising, given the manager leading this class is born and bred in Poland; not exactly known for its diversity or.. external knowledge of the world or Asia
Did you call out a generalisation/racism only to then go on to make a generalist/racist remark about people from Poland?
"People from country X do not generally have knowledge of continent Y because nationally they take an insular approach" is not racism, it's an identification of a root-cause which for anybody that lives in Poland, is quite well known.
So basically, you're saying it's not racist if it's true? Still seems like a double standard to generalize your manager's nationality while calling his generalization of another nationality racist. Especially when you're kind of describing your manager's "racist" pointer to hold true in this context.
Did you call out a generalisation/racism only to then go on to make a generalist/racist remark about people from Poland?