While I certainly agree that the "victim" mentality is not helpful, let's not pretend that racism is not real and pervasive.
Ok, as long as we agree that simple pride is not racism. The main commodity in tech development is attention span. Anyone who thinks that many would bother with outside priorities like ethnic or racial background is kidding themselves. Vi vs Emacs was about as heated as tech bias got and even that has largely gone away now.
You can be content with the fact that your position is sound and the people who disagree have no rational grounds for it, and are just assholes.
That's not how the world works. Those people may simply have priorities different from your priorities and could be frustrated that their priorities are given less weight than yours. It doesn't make them wrong in disagreeing with you. How they react to that frustration is what makes them ass holes.