explain the following sentences in 100 words each.

1- The Europeans were justified in their destruction of Native Americans.
2- the puritan theocracy in the New England colonies is the basis for the desire of may modern religious conservatives to have the U.S. officially declared a Christian nation.
3-The war with Mexico was provoked by the US in order to gain territory in the southwest and California.
4- if the south had been allowed to leave the union, slavery would have eventually ended anyway.