Racism on the part of judges is visibly present in British courts.

If half of all lawyers have seen instances of this, that doesn't mean half the judges have demonstrated such behavior. I expect it is more like 1%. If one out of 100 judges displays racism, and those that do so do it frequently, and if the average lawyer gets to see observe 50 judges' behavior, then half of all lawyers would see a judge act racist.

It is unacceptable for any judge to act in a biased way in court. What's needed is a system for helping biased judges learn, or excluding them.