Theists: how do you account for psychopaths?

[Edwardo Piet]

I don't know what you mean by "it's ok". Tragedies are always a horrible thing, and never ok things. I certainly don't think what happened to me was ok. 

I mean that you are saying that God allows it to happen because there will be a 'net good' at the end of it all.

But we don't know what the long term consequences would be, both in this world and in the next, eternal one,

You see. You're saying that in the long term God could consider it justified.

Even though he could make a world without it that led to exactly the same eventually positive long term consequences?

if this world were one where God always stepped in to prevent anything and everything that would cause us suffering. I assume things would overall somehow not work out very well, otherwise He would do it.

Again, you're offering a false dilemma again. We're not talking about God stepping in to prevent "anything and everything that would cause us suffering". We're talking about him at least stepping in to prevent the very worst things.