I am so not qualified to talk about the Jewish concept of g-d or even whether there’s just one concept of it, so if anyone Jewish wants to talk about it feel free. I can talk briefly about the Christian God, but keep in mind I used to belong to a fairly conservative Protestant sect heavily influenced by U.S. Evangelical Christianity so this likely doesn’t represent all Christians. I mean my old sect, the Korean Presbyterian Church, recently declared Catholicism a heresy I can’t with these fuckers 😂
Much antisemitism below
So in the version of Christianity I’m familiar with God is a unity and Trinity at the same time, the Father, Son, and Holy Ghost. He is heavily gendered, translated with exclusively masculine titles such as King. Not so much gendered pronouns though, since Korean doesn’t truck much with them. Jesus, the Holy Son, is considered to be the Messiah and the fulfillment of prophecies by the Jewish prophets and holy books. (I’m still embarrassed about ever believing this, ouch.) Jesus is considered human and divine at the same time, a concept so tricky–much like all this Trinity stuff–that historically they literally had to kill people who didn’t believe it.
The Virgin Mary is NOT a part of the divine and we were taught nothing about there being anything feminine in God. It’s a big beef my particular sect, and probably many Protestant sects, have with Catholicism that Catholics over-exalt Mary. Some even accuse Catholics of worshipping her as a goddess, which I have seen no evidence of but may not be that far from the history of Mary taking over local goddesses as Christianity spread. But at least we let her have sex after she had Jesus, I think most Protestants believe she had Jesus’s brothers and sisters the good old-fashioned way with Joseph. Evidently Catholics believe she and Joseph never had sex and the siblings of Jesus mentioned in the Bible were cousins or step-siblings, something that had me completely agog when I first heard it.
God as I was taught is all-good, all-powerful, and all-knowing, a trilemma I struggled with until I couldn’t keep up my faith anymore. I’ve since come to think God could be at best two out of three, but from talking to Jewish friends they hardly grant one out of three which is, like, a pretty harsh grade to give the creator of the entire universe lmao. I’ve also been taught Scripture is flawless and perfect and to be read literally, so the pronouncements of God are not to be questioned ever. Like, not the genocides, not the slavery, not anything.
Re God’s shady past, it was a pretty common line in my church that the God of the New Testament was a kinder and gentler one than the God of the Old Testament, and that Jewish people worshipped the, I guess, cruel and barbaric pre-makeover god who ordered slaughters and kept His people to an unbearably harsh set of laws while our God was kindly and full of love (but still homophobic as hell because the Old Testament suddenly becomes super important then and only then). The event that perpetuated this huge character growth in God was evidently the coming of Jesus/a.k.a. Messiah, because now our sins were all forgiven as long as we accepted Jesus as our lord and savior so we didn’t need animal sacrifices or all those technical laws anymore. Yeah, again, I’m embarrassed I ever believed any of this.
So those are the headcanons of God from my old corner of the Bible fandom. It’s far from universal but fairly widespread, and I believe very damaging between its cultural appropriation, antisemitism, and regressive attitudes toward women and queer people.
Also the difference comes in to place with the Bible as well. Jewish ppl tend to follow the god of the Old Testament, all powerful, all knowing, vengeful, jealous, and law abiding. Many of the rules Jewish people ahere to come from the Old Testament, observing the Sabbath, not eating of unclean things like pork. God was something to be feared and have limited to no access to. They also follow the Torah.
Whereas Christians tend to weigh heavily on the New Testament. Christians believe in Jesus, and once he died for our sins the veil from the Old Testament ripped in two clearing the way of god and mankind to become one hence the Holy Spirit. God in you. Though most Christians believe in Jesus and what he did and talked about his two rules, many like to dip into the Old Testament to pick up rules that no longer apply because of what Jesus did. Christians use these rules to okay racism, control over women, slavery, kill homosexuality, killing people who aren’t Christians etc. Christians come from the word Christ as in Jesus Christ.
But a few Christians called Red Letter Christians (which I am) only adhered to Jesus spoken word via the red lettering in the New Testament of the Bible. Jesus gave only two rules 1. Love thy neighbor as thyself. 2. Believe in Him. Never during his time on earth did Jesus condemn homosexuality, control over women, slavery, killing because a person isn’t like you, nor racism.