I think apologizing is the right thing to do.

I also think the shame-game went way too far. Just a one-off "a shame you don't have women sizes" would've done just fine.

They were working on the female shirts. Nobody knows why they weren't here yet. Can we ask about that before we go all "OMG YOU FUCKERS HATE WOMEN" on someone? Please? Or maybe I missed the part where we asked before we grabbed our pitchforks.

Regardless, I think this world could do with some empathy.

.edit: To me, this whole thing feels a bit like bringing fruit to the office for all your co-workers, and some of them gets pissed off that you didn't consider their fruit-allergy.