So you think because you are sympathetic to transsexual people (yes transexual, there’s no such thing as transgender in biology,) everybody else should be. This is one of the attitudes that is provoking a backlash against the LGBT community. Can the author and many of his fellow travellers not see they have no right to demand tolerance of others when they themselves are intolerant.
A tolerant person would not have a problem with that letter, it’s just some old guy saying he is fed up of being told what he can and can’t say by members of a very intolerant minority. Personally I’m with veteran feminist Germaine Greer on the trans issue; “having your penislopped off does not make you a woman.”
Having said that I completely support the right of anybody prepared to pay for the procedures to change the configuration of their body, just as I defend the right of the letter writer to express his views.