Who was persecuting the Puritans?

Puritans had a theocratic society
Many colonists came to America from England to escape religious persecution during the reign of King James I (r. 1603–1625) and of Charles I (r. 1625–1649), James's son and successor, both of whom were hostile to the Puritans.

Complete info about it can be read here. Similarly, you may ask, did the Puritans have religious tolerance?

The Puritans were seeking freedom, but they didn't understand the idea of toleration. They came to America to find religious freedom—but only for themselves. They had little tolerance or even respect for the Pequot Indians, who lived in nearby Connecticut and Rhode Island. They called them heathens.

Similarly, why did the Puritans leave England? The Puritans left England primarily due to religious persecution but also for economic reasons as well. The non-separatist Puritans wanted to remain in the church and reform it from within. The separatist Puritans felt the church was too corrupt to reform and instead wanted to separate from it.

Thereof, who are the Puritans and what do they believe?

Puritan Religious Life The Puritans believed that God had formed a unique covenant, or agreement, with them. They believed that God expected them to live according to the Scriptures, to reform the Anglican Church, and to set a good example that would cause those who had remained in England to change their sinful ways.

Who was the leader of the Puritans?

John Winthrop