How wuold you feel if his teeshirt had a big, smiling Osama bin Laden on it?
I would think he had really poor taste in t-shirts.
But poor taste, to me, does not mean that someone is incapable of setting aside their personal bias and opinions to do their job. Unless it's proven to me that they can't do this, and it will take one hell of a lot more than a t-shirts and the histrionics of what I can only assume is a teenage girl in the OP to convince me of that.
And what others have said is bang on, there is a world of difference between Donald Trump and Bin Laden......and I think Trump is a circus freak.