Can you show any evidence that the judge has acted in a manner unfit of his judicial duty? Or that the case lead to outcomes that were harsher than the norm for such a decision?
So either he is fit to be a judge and is capable of being impartial or he isnt.
by the way Trumps attorney has said publicly that they will not seek to have the judge removed from the case. Actions speak louder than words.
That depends on the basis of the claim. If its based on presumptions about group identity and how that will produce actions, then yes. If it is based on systematic gathering of data on judicial decisions, factual circumstances which cover the expected non-race inputs to those decisions, and information of about defendants' and judges' races, then, no.
Trump has directly said that the judge must be biased, because of his ethnic heritage and the supposed "fact" (which isn't actually a fact, but anyway) that Trump is "building a wall" -- that is, the claim actually being made by Trump is that it is impossible for any person of Mexican heritage to not be biased against Trump because of Trump's specific policy stances.