Because part of living in the Greatest Country in the World is having a government that never learns from past foreign policy mistakes.
I don’t think Trump is preparing a full scale invasion. He knows his military history well enough to know that the situation in Iran is a whole ‘nother ball game. Iraq was not an Islamic state under Saddam Hussein and he didn’t have nukes. The Iraqi people were not rising up in the streets of Baghdad and elsewhere. We were looking for his chemical weapons of mass destruction and we found him instead, along with his two sons, al Qaeda, etc. Trump will do whatever, and that will establish a new foreign policy...like never before.