Difficult to say. Basically it means that if you truly believe in God you will listen to Jesus’s message and obey his commandments: Love God, and Love thy neighbor. If you follow this you will “know God”. Ultimately Jesus will judge. But even to Catholics being a Christian doesn’t mean you go straight to heaven, you may need to be purified in purgatory before. Maybe nonbelievers will just have to spend a really long time there, and then be allowed into heaven.
If you believe the Messiah has not come yet, then do you still believe the gates of heaven are closed? The Old Testament tells us that when people die they go down into the Earth, to “Abraham’s boson” (As Abraham is there to embrace them). As Sheol is described as being one side where believers go, the other side is the “place of torment” where sinners go. Dead “good” people could not enter heaven because no one had yet paid for their sins, because no one is without sin, but they were not being tormented like the non-believers and ones with bad sins. Sheol is also described as being barred and with gates that cannot be breached. These are the gates to heaven.
Christians believe when Jesus died and descended into Sheol, he opened those gates, and the dead in Abraham’s bosom were finally able to get into heaven, as Jesus had paid for their sins with his blood.
If you claim to be a Jew, then who has paid for people’s sins in order to go to heaven as you claim?