What was one of the best reasons that resentment toward Abraham Lincoln built up to an assassination attempt?

Removal of slavery from the country and defeat of confederate army.

Explanation:

The rules and laws of removal of slavery from the country and defeat of confederate army are the reasons that display resentment toward Abraham Lincoln which leads to an assassination attempt. Slavery is a big issue in the United states, the southern states want to maintain slavery whereas the northern states wants to end slavery which leads to civil war. Due to defeat of southern states in the war, the supporter of confederate army attempt assassination on Abraham Lincoln.

as general terms,  indian territory,  the indian territories, or  indian country  describe an evolving land area set aside by the  united states government  for the relocation of  native americans  who held  aboriginal title  to their land. in general, the tribes ceded land they occupied in exchange for  land grants  in 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.