Congress thought President Lincoln was being to sincere and forgiving toward the Confederate side of the US (remember that they seceded from the Union and formed their own goverment which started the American Civil War).
Answer:
The main goal of Al Qaeda is to overthrow the corrupt “apostate” regimes in the Middle East and replace them with “true” Islamic governments, Al Qaeda's "primary" enemy is the United States, which it sees as the root cause of the Middle East's problems
