My guess is that The Donald doesn't use all that many public toilets, but if he thinks there has been so little trouble so far, just wait. We all may be wading in it to our ankles soon enough.
Trump, like many of us, may not embrace the idea of discretionary restrooms and showers, but we tend to give people the benefit of the doubt. The reality of our situation is however different from our idealized perceptions. What was a rare occurrence will now become demonstrable, just as we have seen with most of these type issues. They will be lining up to see exactly how far they can push this. It is not about tolerance or even acceptance. It is about forced capitulation, a demand that we surrender our values for theirs...under penalty of law.
Europeans were proud in their values of tolerance and acceptance and obviously bent over backwards to not only accommodate extremely diverse cultures, but embrace them. In return they now find their good will as an on ramp for immigrants to flood into their countries and demand not only acceptance or even embrace, but dominion over their hosts.
This is why the world has not evolved into an empathetic and loving world, but one of suspicion and distrust of those who do not share their values. In a real world no one wants to be equal. They will say they do if they perceive they are less than equal, but equality is never enough. Species seek dominion over their surroundings and especially those they see as competitors. This is what we call "racism", and it exists for a reason. Real racism is the belief that your kind are superior to others and while many will see this as hatefully, it is also demonstrably true in many cases for many factors. If we win a race, we feel superior and have proven it so, but this doesn't mean we want those whom we just outran dead or enslaved. Progressives use the term racism to infer that one group wants to do another harm when in reality most do not. They simply want to succeed, and will resist and work to defeat those who they see as deterring that success. Cells of our body that resist the invasion of foreign cells are racist in nature. They actually put their welfare ahead of others. The ultimate hate crime. And to think I wouldn't want a 200lb man with a boner in my daughter's school shower. What a hater I am!