Here are just two {of 23} reason for going into Iraq. These are from the Congressional Resolution:
Whereas the current Iraqi regime has demonstrated its capability and willingness to use weapons of mass destruction against other nations and its own people; Whereas the current Iraqi regime has demonstrated its continuing hostility toward, and willingness to attack, the United States, including by attempting in 1993 to assassinate former President Bush and by firing on many thousands of occasions on United States and Coalition Armed Forces engaged in enforcing the resolutions of the United Nations Security Council;
Whereas members of al Qaida, an organization bearing responsibility for attacks on the United States, its citizens, and interests, including the attacks that occurred on September 11, 2001, are known to be in Iraq; Whereas Iraq continues to aid and harbor other international terrorist organizations, including organizations that threaten the lives and safety of United States citizens;
You can google "iraq war resolutions" and get all 23, but these hypocritical congress critters, not only lie, they swear to it. WMD is only one reason, not even the first reason given, BY THE CONGRESS.