Behavioral recognition will do just as well as visual. There are plenty who preach about mankind's ruin even on my own planet.
I can't begin to know the mind of other humans beyond my own observations. Doing the same for an alien is unlikely. The morality of another species is unknowable, especially one who might be hypothetically immortal as someone would expect a god to be. Whether it could be relied on to accept the need to cooperate I can't guess. We may only hope such beings are few and far between, and not likely to appear. I would prefer to contend with the lesser threat of petty criminals.
no subject
I can't begin to know the mind of other humans beyond my own observations. Doing the same for an alien is unlikely. The morality of another species is unknowable, especially one who might be hypothetically immortal as someone would expect a god to be. Whether it could be relied on to accept the need to cooperate I can't guess. We may only hope such beings are few and far between, and not likely to appear. I would prefer to contend with the lesser threat of petty criminals.