Using an example of Hitler's popularity when discussing the validity of a person's opinion on transgender participation in sport is drawing a seriously long bow. Then resorting to name calling is more of an indictment on you frankly.The old living in a democratic society/free speech chestnut, some people believe Hitler was a good guy as well. It's great you've got an opinion, just a shame it's a completely uninformed moronic one.
Given Transgender participation in mainstream sport is relatively new comparatively speaking, I don't think it is unreasonable to say that there will be a lot to play out in this space. I have no doubt that a lot of work has gone in to trying to ensure a level playing field based on what is considered sound biological science, but that doesn't mean there isn't at least the capacity for this to change in the future. The beauty of science is that it doesn't stop, it will continue to evolve, and as the sample size of transgender participation increases, so will the body of knowledge associated with that participation. This knowledge will then be used to inform future direction, whichever direction that may be.