You can’t really think that, can you? You don’t think that there are just assholes everywhere, no matter where you go?
Also, let’s say you’re right and Dubai and the UAE is all the most polite people you’ve ever seen, and nobody is an asshole.
Do you understand that the trade off is freedom? You aren’t free to do shit there. They can fucking throw you in jail for drinking at a certain time of day. They can throw you in jail for flipping someone off. And apparently for yelling at someone.
So, if you want to trade all your freedoms, the importance of which I’m constantly hearing about from fellow Americans, for the appearance of politeness, go right ahead.