Most NATO members are not real allies. Turkey or Greece or Slovenia could fall into the ocean and it wouldn’t materially Americans. NATO had a purpose once, but it’s just become a vehicle other countries to outsource their defense to the U.S.
You want to talk about history? How about: for 70 years American interventionism has resulted in an unbroken streak of mistaken wars that have sapped America’s wealth. Thats where your definition of “ally” has gotten us.