There are thousands of dead Americans because of the invasion of Iraq. What did they die for? Prior to the invasion, Iraq was the arch-enemy of Iran. After the invasion, Shias took control of Iraq, and Iraq became Iran’s closest ally in the whole world.
Before the invasion, Saddam ruled over a secular government. After the invasion, Iraq adopted a constitution that begins with saying the Koran is the fount of all law.
Before the invasion, Saddam had his boot on the necks of the jihadists. After the invasion, that boot was removed, and a civil war between shias and sunnis has been raging ever since.
Before the invasion, Christians worshipped safely in Iraq. After the invasion, it’s been a continuous war on Christianity, and the religion has almost been wiped from the country.
You say all this was worth 4500 AMerican lives - and more than a trillion dollars in additional American debt (most of it borrowed from China)?