Why did the European nations want to conquer the Americas?

They wanted to conquer America because they thought the Red Indians there were dumb and couldn't defend themselves while they could. America also had a lot of resources like bison for food, land for farming, forest for development, large river systems and etc. It was also believed it was a good trading spot for fellow trespassers like merchants and pirates. It was economically good for the center of the trading routes around the world and as it was large they thought it could be easy to spread their people around it as space was running out in England. They also had the ambition to conquer all the places in sight and to make or establish a better world for their people.