First and foremost Hubpages is a writing site. The most important thing is for the members to write, get feedback and earn. Any socializing comes secondary to those.
I have not found any discrimination or hate here. I am mixed race and Jamaican, many would say I am black, and I have been accepted and loved here on HP since the first day I joined. Check my fan mail and comments and you will see.
The trick is to write hubs that every one can relate to, not just a few people. Write hubs that are not controversial and you will get positive feedback.
PS. Based on the comments on some of your hubs I cannot understand your reason for believing that you been discriminated against. Where is that coming from?