Who is this person?

Of course! They have to create agents of capital from amongst the workers, and that means proclaiming the "benefits" of imperialism.

Understandable, that is useful too

I believe that it is somewhat useful to focus on the USSR, since they had a lot of valuable praxis and theory which a Marxist should learn, but I agree that one should expand their knowledge to other countries of actually existing socialism, and even other non-imperialist (yet not communist) countries

It is a simple one really: that imperialism brought civilization, technology, and relative prosperity to the natives (some youtube channel that "debunked" communism said this)