Why do some mono-racials give bi-racials a hard time?

Hello, Yahoo! Answerers. By the way, I'm not saying all mono-racials are like this, I'm understand that every race goes through something and I want no negative, obnoxious or off-the-subject answers. If you are against bi-racials or if you have a strong hate towards them, then don't bother answering. Anyways, I notice many mono-racials says stupid stuff about innocent bi-racials. For example, they say they shouldn't exist, they shouldn't belong to any race, or be a part of their families. Also, they're told that they are diluted and society's collateral damage. This leads me to some questions in which why do good people suffer? For example, look at the Jews in Germany. They were innocent and yet Adolf Hitler killed them. Same here with bi-racials. We're innocent, we didn't ask to be bi-racial, we didn't start any rivalries or conflicts against anyone and yet people hate us just because they feel we're diluted and too confused. It's sad. It really breaks my heart to see bi-racials go through all of this. I pray for them every night because I want it to get better. And, I want to go out there and do something about this. Us bi-racials of any combination should come together and peacefully protest so people can figure out that we're human and we have feelings, hearts and souls just like anyone else does. I know I might get some negative feedback on this, but fine. At least, I'm not going to let it hurt me and stand in my way. God Bless. And please pray for us. :)