[There are diplomatic ways to negotiate the problem.
Ukraine is just irrelevant on this issue.]
Why use diplomacy with a guy who used force? Saddam had decades to get his country going. Instead, he wasted that time invading Iran and then Kuwait. It was clear he had to be blocked from invading Saudi Arabia and evicted from Kuwait. Funny how the Russians helped their allies invade South Korea and South Korea, yet objected when the US acted to evict Saddam from Kuwait. The principal theme here is perhaps that Russia’s allies should be allowed to expand at will against America’s allies.