My friend and I have fallen out.
She has zero empathy for any type of animal or living thing other than herself and her children, basically. I find that utterly baffling and quite upsetting, and I don't think I'm unreasonable in that respect, but I might have overstepped a mark a bit by saying this, and I want some opinions.
She was here yesterday with her two children so our children could play together. They were playing in the garden, we were sitting out with them, chatting. DD came running to me, excited, saying she'd found a really big beetle, asking for me to come and see. She's 3 and obsessed with mini beasts. My friend's children overheard and came to see too. They ran ahead of me and my friend followed behind, by the time we'd arrived her son had STOMPED on this beautiful stag beetle (I think) and killed it 
DD was so fucking upset. Honestly, it was just such an unecessary thing to do. The kid is 7. It's inexcusable. I reacted, raised my voice a bit and said "Why did you do that?!" he just laughed and said he wanted to stand on it. I said that's a really nasty thing to do. Then bent down to see if he'd 'popped its head off'. He had, he was quite pleased with himself. His mother said nothing, I looked at her for a response and got a half-shrug.
DD was in tears by this point so I took her back to where we were sitting and friend joined me. I was comforting DD. She said, "I think they get it from me, they just don't like animals"
I replied, "well that's fine but they shouldn't kill them"
"Well it's not like it was a cat or something"
And this is where I got a bit angry and said "yes well it starts off that way doesn't it, with that attitude you're raising two psycopaths"
She was obviously offended. Sat there for twenty more minutes with a look on her face before making an excuse and leaving, awkwardly. Got a text later saying she thought I was completely out of order calling her kids psycopaths, kids step on insects and I'm overreacting. I didn't reply. She texted again telling me I'm a hypocrite since I'm not even vegetarian
and she doesn't think she'll be coming again.
WIBU to mention the word psychopath. I was angry, it may have been over the top, but I still think it.