Why isn't the US isolationist?

Isolationaism=flawed idea. No one likes you or hates you for any political reasons. You screw other countries, they will screw you in turn. You don't bother to learn about the world, people call you an ignorant idiot. You call Iraqis cavemen when they were one of the most civilized peoples when the USA didn't even exist and when your ancestors were serfs. If the USA shouldn't waste cash, it should have never decided to. WW2-You Americans didn't get involved, Hitler might have attacked you after he finished off Europe.