Why are we to believe that God/Jesus is good and not evil?
If you think about it, if God/Jesus was evil then he would tell us the exact same messages that he already tells us now. So what is there to show that he is indeed good, as opposed to just doing seemingly good acts (even that is debatable, the Old Testament God seems horrendous to me) in order to eventually trick us in the end? Is there some inherent reason to believe that is the case?
And you can’t say “faith” because there’s no reason to assume that you’re putting faith in a good god as opposed to a bad one. Satan would also tell you to have faith in him.