Sex is biologically and objectively real, but also (most probably) more complicated than you would guess. It is really not as hard and fast as "there's men" an

Sex is biologically and objectively real, but also (most probably) more complicated than you would guess. It is really not as hard and fast as "there's men" and "there's women" and "you can tell them apart by a quick genetic test". There's basically a sliding scale from "definitely male" to "definitely female" (in unmodified body) and a mostly-but-not-always correspondence between said body and the genetic markers (XX and XY). If the testosterone receptor codons are damaged, the extra testosterone that the XY chromosome normally produce will not get a chance to influence the fetus, so any make characteristics will be under-developed (or not developed at all). Heck, there have even been genetically XY people who have sustained pregnancy and given birth. I mean, somewhere between 0.02% and 0.05% are born with effectively both make and female sexual characteristics. So, yes, as long as you insist that "there are two sexes, and it is objectively easy to say which one is which", I would say that it is, if not hateful, at least ignorant and disrespectful.