Complex sentence: Barely tolerant of other Christians denominations and viewing the native peoples largely as savages and heathens, the Puritans were also soldiers and traders who had little interest in friendship or cooperation with the Indians.
Split into simpler sentences: Barely tolerant of other Christians denominations, the Puritans largely viewed the native peoples as savages and heathens. They were also soldiers and traders, who had little interest in friendship or cooperation with the Indians.