I personally agree with this statement.
I mean in hindsight, you'll start to understand why it was inevitable. Iraq was ultimately winning, with the support of the US and Britain; giving the Iraq firearms (technology that was far powerful than Iraq's past weapons), money (to help support any financial aid/problem that Iraq may possibly encounter), and much more. I mean with this arsenal of reinforcements and supplies handed over to Iraq, they were obviously going to fight based on all the trouble the superpowers (the US and Britain) gave.
I hope this helps you!
The war between the two-person was inevitable for several reasons.
In the Middle East, during 1952, there was turbulence among Arabs for a requirement of leadership. The gap filled by Gamal Abdel Nasser of Egypt. Over many years his ideas and evolutionary zeal have provoked French, British, and pro-Western monarchies.
With the death of Nasser in 1970, there was a sudden race for the leadership among the Middle Eastern leaders. Ayatollah Ruhollah Khomeini of Iran and President Saddam Hussein of Iraq were among them.
Saddam Hussein advocate progress under the secularism. He believes that a dictatorial government that force modernization is a shortcut to progress.
Ayatollah Khomeini believed that the Middle East controlled by foreign powers. His opinions and ideologies opposed to Saddam Hussein. Ayatollah urged the Shia of Iraq to overthrow his government.
Saddam Hussein invaded Iran in September 1980 where his attack led to forecast Iraq as the new leading power. Saddam led the war between Iraq and Iran for eight-year.