That depends on how much or how little of a dick you want to be to them. Personally, I'm leaning toward "don't be a dick"; especially since the science is increasingly supporting gender identity as being a separate quality from physical sex, and grounded in neurology rather than reproductive organs.
There are just not enough eyeroll emoticons for this tired old false-equivalency canard. Gender identity, gay marriage, sexual preference, interracial marriage, is there nothing this particular brand of fallacy cannot be used to denigrate and dismiss?
But being that you're someone who happily believes in the most ridiculous conspiracy theories surrounding the issue, I'm not at all surprised that you'd resort to false equivalencies as well. Got any other tired old woo tactics to trot out?