Some settlers argued that the land belonged to the Indians. These forces were excommunicated and expelled. Massachusetts Governor Winthrop declared the Indians had not “subdued” the land, and therefore all uncultivated lands should, according to English Common Law, be considered “public domain.” This meant they belonged to the king. In short, the colonists decided they did not need to consult the Indians when they seized new lands, they only had to consult the representative of the crown (meaning the local governor).
The colonists embraced a line from Psalms 2:8. “Ask of me, and I shall give thee, the heathen for thine inheritance, and the uttermost parts of the earth for thy possession.” Since then, European settler states have similarly declared god their real estate agent: from the Boers seizing South Africa to the Zionists seizing Palestine.
The European immigrants took land and enslaved Indians to help them farm it. By 1637 there were about 2000 British settlers. They pushed out from the coast and decided to remove the inhabitants.