, let me make this super simple, explicit, and clear, since you are having trouble digesting what other folks have been telling you:
Racism is not
just prejudice over race. It is that plus a difference in power and privilege. While you and I may occasionally encounter prejudice over being White, quite simply the world is arranged such that we are usually given the benefit of the doubt, have access to more resources, our opinions are listened to and taken into account more often, we don't have to fear unprovoked harassment and assault by the police, and so on, all by virtue of the color of our skin. In other words we have White Privilege. I myself have the added advantages of being male, able-bodied, reasonably neurotypical, cis-gendered, averagely attractive, over 6', average weight, and heterosexual. I would guess that you probably have the advantage of being Christian, but won't speculate further.
You have indeed encountered some (relatively mild) prejudice over your race in this thread. However, that prejudice does not rise to racism, because you have the option, the Privilege, of simply avoiding it. That you haven't taken advantage of that option is to your credit, but what you've done instead
is assert your Privilege over the other (non-white) participants in this thread by insisting on a false equivalency between white prejudice toward non-whites and the reverse. Which is
racist, because the two are manifestly not
A man, coming into a thread of women discussing a case of rape, who asserts in the most sincere possible way that men have to deal with women's prejudice against them as well, and to please stop bashing men indiscriminately because not all men are rapists, is still frankly being a Sexist asshole, because the whole of society is oriented around giving men privilege over women, and he is asserting that Male Privilege to have his opinion be given at least equal weight in a forum where he should instead, if he wants to participate as an ally, be supportive and listen more than he speaks.
In just that sense, you are asserting your White Privilege in this forum, and that is racist