One of the most compelling arguments that gender orientation resides somewhere other than genitalia is in intersexed people.  Because with both sets of genetalia present, there is still a gender orientation self-perceived!  Which proves that gender orientation resides somewhere other than that genetalia.

Just like it does for transgender people…

…just like it does for cis-gender people.

There is no reason to hate, no reason to reject…except for one’s own predilection for fear and ignorance.