I think there are situations (maybe sneak attack) that call for a create hostile to your target rather than an ally of you.
Is that intentional so a third party can be either your ally or only the enemy of your enemy?
— Viktor Bengtsson (@ViktorEGB) November 12, 2018
Yes, that's intentional.
— Jeremy Crawford (@JeremyECrawford) November 12, 2018