Those ideas are not the core of buddhism. Its like saying that christians believe in the easter bunny. They are just historical and cultural baggage that got along for the ride.
Buddhist hell is not a place or something to believe in, but it's an explanation of a certain state of mind. The same for god.
So it's not a tradition or something to believe in (btw it's nothing to believe in buddhism as it'd contradict the basis of a buddhism where you just practice with the guidance of your teacher, you don't believe in things but rather check them).
Btw it's a pity and quite a cultural harm that mistranslations or just inability of western discoverers of buddhism to think beyond some closed view caused spreading lots of bullshit about buddhism.
