trump and nato

[Danzig]

https://www.washingtonpost.com/news/...hare-for-nato/

got home from work, and decided to do some searching on nato, funding, etc. thought this was a good read on defense, spending, etc.
and yes, other countries do count on us. we do project our might around the world.
but I remember when Obama said something about a red line and Syria. I said then, and since, you NEVER let anyone else know what you're thinking, especially militarily. I don't like trump suggesting that the nato alliance isn't airtight. it has to be airtight. do we win the cold war without nato? how many other conflagrations have been avoided because nato exists?