I don't like some people but at the same time, I think "Ok leave them alone". I'm unsure if I can really forgive people-I've actually tried to in the past but I don't think I ever really do. But I can definitely just leave them alone... .that is something I can do... it's more practical, I guess.
Agreed. I think I do that too.
I haven't heard of Kin Altruism before-can you tell me a bit more about that please?

It's a form of the Camp A and Camp B, so really it's the opposite of the Christ/Buddha solution of loving (or being tolerant of) everybody.
Kin altruism essentially means that you'll sacrifice a bit of yourself for people you are closely biologically related to. So Camp A is your family (and the closer related to you, the more firmly they are in Camp A), and Camp B is everybody else on the planet.
It appears that many animals -- possibly all -- behave this way, so it may be a core element of evolution by natural selection. You can find out more about it at the Wikipedia page for "Kin Selection".
Two statements from that page that encapsulate it for me:
"Kin altruism is altruistic behaviour whose evolution is driven by kin selection."
"R.A. Fisher in 1930 and J.B.S. Haldane in 1932 set out the mathematics of kin selection, with Haldane famously joking that he would willingly die for two brothers or eight cousins."
The meaning in that last part is that our DNA splits evenly as you get further down the line -- our child has half of ours, our grandchild a quarter of ours -- so that mathematicians (like Haldane) can calculate whether it's worthwhile
to our own gene line to take a risk that involves possibly hurting ourselves to save someone else. The less related to us they are, the bigger a risk we're taking (of our own genes not continuing).
Anyway, I think we're off thread here... .-- but, maybe it relates to a genetic component in BPD, and lack of empathy... .? Hmm... .need to think about this a bit.

PP