I am glad you are thinking smart and logical. Most of the comments, threads, blog....etc you read here, its from white males, either they are pretending to be women or fantasizing about white women with black men. Don't believe everything you see here is real.
Yes, there are real good black men who you can find and meet here. Make sure to take your time to chat, face to face (Skype, WhatsApp) and get to know that person first, before you meet and jump in bed with anyone.
Regarding racism, you cannot change how people think, act or the way they behave, but you can change how you want others to see you. There are lots of good white and black men on this site and everywhere. Don't give up....lol.