What caused people to leave the Massachusetts Bay Colony is that church leaders or ministers did not take ideas from their own. Some were forced out of Massachusetts.
Roger Williams.
i don't know actully
They didn't agree with the Puritans
roger williams
The Rhode Island colony started because Roger Williams had religious ideas and then had to leave Massachusetts others liked his ideas. So they were traveling and soon found providence which became Rhode Islands capital. Soon other people started to find about Rhode island and moved there.