he had shyt on aquaman, cyborg, flash, and ww...easily could figure out bruce/clark...also, people are ignoring whom he had working for him: the Russian dude is kgbeast....look him up and you'll know...
as for batman killing people: people are overblowing that....yea, he blew up cars, which probably killed those cats, but he's always done that shyt and no one cared/screamed 'he killed people'...he was doing that shyt the tim burton batmans....the thing about his 'no killing rule' is he doesn't intentionally kill someone (point a gun at them, stab them in the neck, shyt like that), which he didn't do in this movie....although you cld say he did intentionally kill kgbeast lol....