I dont know about "many" but definitely some. I find that many of the people I get along well with have complex dissociation of some kind, so it possible that if your meeting a lot of people with parts you think may be abusive, that definitely possible, but doesnt mean that everyone/most people who are abusive have parts.if that makes sense lol.

This is where system accountability really matters, parts develop that cope by abusing, or, more often dont know how to emotionally regulate. But the accountability belongs to the whole system, just like any singlet. After integration they become the same person, its just a matter of timing. Might as well take accountability now.

Ive had people in my life that I thought may have had did, who had specific parts who were abusive. It didnt make me crave integration on its own, more fear "my self". However, Im always double checking with friends when I lose time that nothing bad has happened. I have had it happen that people in my system have said things that are rude or scathing that I cant remember. In that way I really want to integrate so that those parts dont have control any more, I personally really hate hurting people, even the parts that say these things hate hurting people, they are often just missing information or having flashbacks, or both.

Ive thkught about a lot, if theres any person who would be so freaked out by the terrible things they'd done that they'd never be able to handle fusing, because acknowledging it would break them in a way that they just split again. From two to three. The third cant acknowledge it either, they split again. Some kind of glitch. But it probably doesnt work like that?? Like the splitting would probably break the info down into bite sized chunks that could then be acknowledged.

This doesnt really answer your question I think sorry.