Why did Lewis amisted get kicked out of west point?

Lewis Amistad was not actually a historical figure associated with West Point; rather, you may be referring to the Amistad case involving enslaved Africans in 1839. The incident involved a mutiny aboard the slave ship La Amistad, leading to a legal battle in the U.S. courts over their freedom. If you meant a different individual or context related to West Point, please clarify for accurate information.