No one denies that these people exist. That's silly. They disagree on the definition of gender or sex, and disagree that gender or sex can be changed. It's all semantics. Who cares if these people have stuck with an outdated definition of gender? Let them be ignorant. You shouldn't get to force people to use the same definition of words that you use just because outdated language makes you uncomfortable.
It's not wrong to tell a boy to be a man. You should teach your son to be strong minded, so he can stand up for himself, defend himself and eventually take care of and protect his family. How are those toxic things? If the lessons don't stick and the boy ends up super sensitive and anxious or whatever, then that's fine and you accept the boy as he is, but that doesn't mean you give up from the start without at least attempting to help him become a strong minded man who won't get walked over in life.
It's not wrong to tell a boy to be a man. You should teach your son to be strong minded, so he can stand up for himself, defend himself and eventually take care of and protect his family. How are those toxic things? If the lessons don't stick and the boy ends up super sensitive and anxious or whatever, then that's fine and you accept the boy as he is, but that doesn't mean you give up from the start without at least attempting to help him become a strong minded man who won't get walked over in life.