She pretty much told Wonder Woman why she was doing it. She was under influence of Trigon and by waiting till the right moment for her to summon him.

This.

And if we look into Raven turning into Trigon's puppet not impossible.

I mean - It looks like Joker's nuke took out some of the Titans and seeing as Raven is quite emotional and its not impossible to think that in her weaker moments she was counselled by her evil father and became his pawn.

No the real mystery I find is "Regime" Wonder Woman.

I mean even in the set up comic series there is nothing to reveal why she is so radically different from Normal Wonder Woman. Genuinely a villain more than a hero. Like Lady Macbeth pushing Superman more and more.

She doesn't even have the kryptonite laced fear gas excuse.

But then again I'm still not a fan of the whole "No in this world Lex Luthor was Superman's best friend" thing.

Yeah the latter part is basically and explanation for Wonder Woman and Raven. The only thing that's different isn't just the fate of Metropolis and what happened after. There are probably many many many other things that happened even before that moment to change who the characters are. Raven just might be flat out evil in the Regime world, a kind of undercover agent for Trigon. Wonder Woman is clearly more into war and dickmatized.

As far as regular Raven she abhors violence but will defend herself and others. That's it that's all.