Dealing with Unwelcome Attitudes Towards a White Muslim Brother

As-salamu alaykum. I'm a white revert to Islam, and I'm married to a wonderful African Muslimah. Recently, I faced some upsetting treatment from some of my Black Muslim brothers. I was helping to set up a new local Islamic center, but during planning meetings, one brother wouldn't even listen to my suggestions-yet he'd immediately agree when another Black brother said the same thing. He even insulted me on a group call in front of others. When I spoke up, he didn't offer any apology. What really hurt was that none of the other brothers on the call said anything to support me. It felt like a clear case of prejudice and wasn't the Islamic brotherhood we're supposed to have.