KLM has only 1 base, Amsterdam. All crew is based there. More than 90% have the dutch nationality. You can therefore expect a dutch approach, by the crew, to these situations concerning LHBTI and/or breastfeeding. And the netherlands are well known for very liberal world views.
These outsourced social media employees can keep sending terrible responses. But it does not reflect the actual on board situation.
Very disturbing that some dork can send an e-mail like that, and the rest of pprune/the world believes that it really represents reality on board.