Question

Why did the Mormon faith come under new attack while they were settled in Nauvoo, Illinois? Why did the Mormons eventually leave?

Answer 1

This is the exact answer so i would put it into your own words!!!

It was in Nauvoo that Joseph Smith announced his most controversial revelation, plural marriage, or polygamy. When a newspaper exposed the Mormon practice of polygamy, Smith became outraged. He ordered the destruction of the newspaper’s press, which led to his arrest. An angry mob stormed the jail where Smith was being held, and he was killed. A Nauvoo charter asked the Mormon community to leave.

Answer 2

Because the settlers that already lived there did not accept Mormons or the practice of polygamy. The Mormons eventually left because they were tarred and feathered, their temple was burned, and they were virtually ran out of Illinois.