Your ignorance is an act of oppression, no matter your good intentions.
After years of dealing with these types of comments, I'd had enough.
Gender-segregated parties and weddings have, to some extent, always been a part of my life. But over time, the segregation become more extreme and overt.
It's not okay to keep telling children that piety looks like segregation. Because it's not true, and it sends such a twisted message. It's not okay to tell children that a high-five is inappropriate because it leaves room to be interpreted as something "more."