There is a reason why there is a thing known as "womens sports". That reason is so that there is a level playing field. It is the reason everyone dopes, or everyone is drug tested.
Allowing transgender males to compete in womens sports will destroy the sport. So, you have to ask the question: Destroy the sport or be called anti-transgender.
I agree. An individual with a Y chromosome regardless of how they identify has an inherent physiological and biological advantage over women. Politics don't really apply to genetics and that's the problem.