No you're not disqualified to comment because you're white. You're not particularly entitled to comment is my point, except in a "I have a mouth and it's my right to use it" sense, and your words do not seem especially imbued with any kind of understanding that you might have gained from your circumstances.
I mean, just the fact that you're bringing out nazis and the klan as your examples of most white racists is absurd. The white racists who are the problem aren't the people who go out of their way to how everyone how much they subscribe to theories of white supremacy. Between those people and, say, Rush Limbaugh listeners or people in favor of starkly discriminatory voter laws, the latter are much more of a threat to daily life. And those people don't think they're racists, because they believe racists have hoods and swastikas.
Jesus it's not cherry-picking at all -- there's a reason why "I can't be racist, my best friend is black" is a joke/gag/dead giveaway of racist attitudes. You should try hard to understand why that is. Presenting the Asian-ness of your wife as if it immunizes you from being racist, or proves you aren't now and can't ever be, is classic tokenization.
Maybe this is a new idea for you, but some white guys marry Asian women because they're racists. They project their weird stereotypes/fetishes into an entire race of women. Cross-race affinity, still racist. Not saying that's you, just saying racist behavior is more than "I don't like those people."
Another thought for you -- people can and often are more racist towards some groups than to others.