You can educate someone. It takes time and patience, but it's possible. I'm not saying people can't grieve or feel worried, but I said and am still saying that making hateful blanket statements about a group of people is wrong no matter who it's coming from. And in the case of people who say things like, and i quote, "Blood is all that matters to them. Let them breed together, scraping the bottom of the barrel of their ever shrinking gene pool" and "Congratulations on your inbreeding that has allowed the lack of blood flow to your brain to not be able to tell the difference between an accomplishment and a tragedy" are hypocritical.
As I said before, returning hate with hate isn't doing anyone any favors. A person can express frustration without being a jerk about it.