I am the bi-product of an interracial marriage (dad black, mom white). I look white. I grew up in a black neighborhood. I never had any major problems due to looking different than my peers. I earned everyone's respect and everyone earned mine. I have only ever dated black and latina girls/women (and one west Indian). It's not that I never wanted to date a white girl/woman, it's just that I was 90% of the time around black folks.
Ironically, my wife is also black and white and she looks 100% black. So, we APPEAR to be an interracial couple but technically we aren't. So far, in my 12 years of marriage, I have never had anyone say anything racist to us about us being together. Perhaps it's because I would kick their ass(es).
Regarding the WTBTS being anti-interracial... All you need to do is look at every cover they ever made. You will not find ONE WT or Awake! magazine with an interracial couple on the cover. That's all the proof I need!