POLYTHEISM
The term for this is polytheism, as opposed to monotheism which is belief in one God.
they worship kachina dolls who were there gods
no
Many religions have a plurality of gods. Hindu is a good example.
They worship the gods by holding ceremonies to certain gods, and make sacrifices in their honor.
Norse gods
No the Romans did not force the Jews to worship their gods.
Yes Chinese people do worship many gods
the people of sumer practiced polytheism the worship of many gods
Jains worship at a Deraser.
They would worship their own gods
There is no real answer to this. Christians worship God and Jesus and Hindus worship a plethora of gods, one god, or no gods at all.