"Where some homosexuals let themselves down is demanding almost that everyone should put up with them forever demanding this or demanding that, and forever thrusting their sexuality in front of us, 'Gay Pride' springs to mind. "
"Demanding" the right to be able to call a marriage a marriage doesn't strike me as particularly radical, personally.
And why should gay pride bother you? For a multitude of historical reasons, 'white' just isn't as strong an identity as 'gay' or whatever - there's virtually no sense of shared historical experience that just applies to whites and defines them as a community.
Think of it like this - an identity is what sets you apart from the crowd, so to speak. White heterosexual men, if you like, are 'the crowd'. And historically, until recent times (say, the last 30 years or so) have had all the associated advantages. What you will find, however, is that white men can and will identify themselves in several different ways (by age, formerly by social background, sometimes by nationality etc etc.).