It seems unlikely that horror at the invasion of Kuwait, and concerns that Iraq might annex the Saudi oil fields were all just pretend. Certainly the Saudis didn’t seem to be pretending to be worried.
I could make a fair moral case for invading anywhere bigger than the mini-states like Switzerland.
Are there any countries in the Middle East where there isn't a good justified reason to invade them? I can think of reasonable reasons to invade Israel, Iraq, Iran, Afghanistan, Syria, Saudi Arabia, Yemen and Pakistan. Some of those reasons have actually been used.
Similarly I can think of great justifications for an invasion of China, North Korea, Russia, pretty much all of Africa, the United States (they have a substantial amount of blood on their hands!).
Europe I personally struggle to think of dirt on in the last 50 years, South America I don't know much about. Most of South East Asian nations seem pretty well behaved to me which makes them a global rarity.
The fact that the US invaded somewhere where there were real reasons for concern is nice, but as far as I can tell that would be true of any invasion of any country short of sending the troops into Canada or re-invading Germany. In the Middle East it doesn't really mean much.
No, you really couldn’t. You could come up with all sorts of reasons for disliking them, or wanting to harm them, but that’s not the same as a reason for expending the huge economic, military and human cost of invading them. To invade a country you have to be willing to pay the price of doing it. Nobody has a good reason to want to pay the price of invading Pakistan. Not even India.
That could change, sure, but that’s not the situation as it stands, and if you can’t see how that works, I’m not sure how I can help you get there.