Education is always the go-to way to combat these ideas. But of course, there will always be some people that will remain voluntarily ignorant. (And the other side, also wants to use it for the other way around.)

As said in another comment, I am cis and know nobody that isn't. This of course leaves me with little outside of the wild west of the internet. For this I ask you, do you have any resource (books, documentaries, videos...) that can help me understand the concept better so I can be a better supporter?