Ah, now your statement is starting to make a little more sense. By "white country," you actually meant "multi-ethnic country with a majority white population." None of the countries you mentioned are "white countries" by any normal definition. And by "racism" you meant "institutional racism," that nebulous term the steaming pile of horse manure (the text you quoted) does nothing to support. Nice job of moving the goal posts. Racism is, of course, a real thing.
I'm guessing you were brainwashed at a Western institution of higher learning within the last 20 years, but please correct me if I'm wrong. If you're going to bring up a fuzzy, ephemeral term like "institutional racism," I'm afraid the burden of proof is on you. Which institutions, exactly, are perpetrating the racism? Can you give any concrete examples?
As an American, the clearest example I can think of is affirmative action, which sets racial quotas for applicants accepted to universities. The problem is, this example works against your claim, as it results in less qualified minority applicants being given slots that would have otherwise gone to white (or Asian American) applicants. This policy is even more discriminatory towards Asian Americans, but nevertheless is an example of whites being "institutionally marginalised." This phenomenon is well documented.