Happy for you! Talking with girl should first priority yes. now thinking about sorting out family problems. Got advice for you: Never, never underestimate parents. Careful at thinking you can see through them. Maybe you already consider that.
Frigid Onanoko not know much about racism. In own opinion, racism is set of prejudices against stereotypes (race in this case,) formed and expressed often more habitually through deliberate choice. This expressed in belief that "they" are different than "us." The flaw in thinking is where details of some people are generalised on whole demographic group. FO think racism not so much about "them" but about the "us" and in particular about the preserving of "us." Also, think that if community not around, racism much more chance to dissipate in individual (curing individual from folly of racism.) FO mean with this, your parents may dislike black people simply because afraid community dislike them for associating with them. Or their children.
This no silly idea: Disdain of community can be terrifying. It every now and then ruin life of people who attract this 'wrath.' Thinking about witchhunts, Kristallnacht, Hutus vs Tutsis – it happen all the time. Remember Bush saying “If you're not with us, you're against us?” This exactly attitude that so scary. So Frigid Onanoko think racism not actually fear for “them,” but fear for retalion from “us” due to noncompliance. Such consequences of course not explicitly mentioned in community, but usually understood very well, nonetheless. Funny part is, these people captured in expectations of what the neigbours think, but usually overestimate here. And neighbours do same. It self reinforcing cycle. Vicious, no? You see, FO is liberal airhead – gonna stop fuming weird ideas about social mechanisms now!
Frigid Onanoko writing this all to back up following ideas: Expecting revolution from your family not valid option, as it be very difficult for family, so don't. Also, racism is problem of community. If wanna reduce it, you need be part of community and you need do it yourself. Show you tolerant, sometimes question instances of racism. Don't be mutiner, dissenter, it undermine your strength to change community. You no can change community from today on tomorrow. Gonna take years, be patient. Can make start at own home. Yes! Own home, oops! forgetting this all about you, no? Ok, gonna give more practical opinion then.