Something I don’t think a lot of people talk about is that the bible was not originally one flowing book. Ergo the violent and bloody God of the old testament shouldn’t taint your opinion of the God of the New testament, which explicitly states the old laws are no longer to be practiced. And yes over history Christians have done bloody and terrible things, but that is the fault of the Christians that did it, not god. You will not find any place in the New testament, which again was not written in a book with the old testament at the time of it’s creation, encouraging such things. Also Christ never condemned homosexuality or encouraged hatred or violence of any kind.

But again you can’t prove either way. Although it is much easier to disprove Santa than Satan.