I don't hate anyone currently. Probably right after I found out about OW I hated BF and OW. No hate there anymore. Pretty neutral. I actually like SM now.
I have never hated SD19 although I do dislike her because she is not a nice person and she has caused many people much pain.
Have I hated BM? I am sure I have had moments. But like SD, I dislike her. And mainly because of the way she treats DH.
But I have never hated a young child. Nor have I ever wished that someone simply didn't exists. Hate is a really powerful emotion. I think of it as the opposite of love. All the positive good stuff love does for the soul, I believe hate does as much bad.
Yet there is obviously support here and on other CM forums for a hate filled life. That there are acceptable reasons to hate. Maybe a stepchild has stolen from you or has beat your other child. Maybe BM has sent DH naked pictures of herself and has caused difficulty in your marriage. Maybe she has stalked you and your home.
What are those acceptable reasons to hate?