If you can read Spanish, it is worth the click. His Tweet is actually very good and insinuates a denial while maintaining the focus on rejecting transphobia. His tweet ends with;

Yo soy heterosexual, pero jamás escucharán o leerán de mi una palabra transfóbica. Porque no solo dejaria de ser hombre, sino humano.

I am heterosexual, but you will never hear or read a single transphobic word from me. Because not only would I cease to be a man, but human.