So you would prefer that the US just withdraws from NATO now, to reduce the unpredictability? That's fine by me. If unpredictability is your issue, Trump should be able to address that by withdrawing tomorrow.
>I do not see why usa should be "thanked".
If you think our involvement in Europe over the past 80 years has been positive, you should acknowledge that. If all you do is complain, it's natural for Americans to think "well, maybe our involvement in the continent isn't positive... perhaps it's time to pull out and see if they stop complaining about everything". You're not complaining about Brazil, Australia, Switzerland, or China the way you complain about the US. I think we need a reset to make the US/Europe relationship more like the Brazil/Europe relationship.