How else is personal racism (as opposed to systemic racism) to be defined. You seem to be saying,"Trump is not a racist, but he's a racist".
I think I cleared this up later, but I will try again in case it wasn't sufficient. Firstly, judging someone else's level of racism can be hard. We have overt acts, covert acts, and subconscious reactions. All of these are indicative of beliefs. We certainly are not privy to the information regarding all or even most any persons actions. The next issue we face is that calling someone a racist is much like calling them a liar. If someone has lied on occasion are they in the same category with a person who lies on a regular basis? If they lie about little things but are honest regarding important things are they equally classed liars?
We can take a very black and white view of things or we can acknowledge that there are shades of gray as well. Again I am not trying to excuse any racist behaviors. I am however differentiating between someone whose core beliefs are shaped by racism vs someone who has some peripheral racist beliefs.
With little question, we can say that Trump has some peripheral racist beliefs. Unfortunately, so do many in the United States. That so many relate to these is more worrisome to me. That such beliefs which are not presidential are forgiven is the real sign of a problem.
The sad truth is Trump is a racist in the same fashion many Americans are racists. It is a worldview that largely disregards race but at the same time doesn't hesitate pull from these peripheral racist notions to draw support, vilify an opposing party, or to feel safer.
While such peripheral racism is by no means fair, or proper or presidential, it is not the same type of racist as David Duke or Elijah Muhammad.