Being AI would actually make them very little likely to start a war on anything other than self preservation. They symply have no other incentive to do so. But it also mekes them unlikely to show mercy for any other reason than to prevent their own casualties. And we're not talking platforms here. EDI comments on this. Since they're not individuals they don't value individual lives. Thus they don't have a reason to care who they kill as long as it's the best for them as a whole.