Why do so many Americans think the Pilgrims were fleeing Catholicism?

1620 Why were the Dutch escaping the catholic church when they were in the Dutch golden age, when they were very rich and powerful.

1620 The pilgrims weren't escaping the Catholic church, they were escaping the Church of England and king James the 1st who is responsible for the king James bible most prodestants read was king.

The pilgrims were escaping religious persecution in their minds but in reality they were extremists. Some compare them to the Taliban in terms of religious extremism.

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Why do so many Americans think the Pilgrims were fleeing Catholicism?
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