The rise and fall of personal activism

I recall growing up hearing from various sources that relationships between white men and black women couldn't work. There were accusations of ill intent on his side and even when conceding no ill intent the idea was that push comes to shove he will put being a white man above being your significant other. I didn't buy then or now that those are predestined events.

I am now coming to understand more of where those attitudes come from. I know a guy, white with a pretty unapologetically bigoted family who married a woman of color. While they were together he was the outspoken champion against racism even going as far as cutting ties with some family members over their inability to change their ways. It should be noted that before becoming involved with her he'd no ever taken a stance on the issue against his family but when it became personal he stepped up with all the vigor of one discovering the worlds unfairness and zealously sought to eradicate it.

Well time passed they parted and something was noticed. Vacations were had at the houses of family members he'd previously eschewed. The vim and vigorous seemed to have made way for reintegration into his family although they hadn't wavered in their ideas. It makes one question the validity of his earlier stances. How could someone so willing to separate from wrongheaded loved ones be cool with being brought back into the fold when the reasons for leaving were just as apparent as ever. Seems that while he was involved with a brown woman whom he adored he was willing even eager to take strong stances but upon being no longer personally invested with a person of colours happiness it was pretty easy to shelve ideology in favor of family.  On the one hand that doesn't sound like a bad thing, family is important after all but should blood be thicker than adhering to principles of human decency?