People seem to conflate NATO with supranational organisations like the EU. NATO was created as a military alliance, not an economic/political experiment. America has turned it into a quasi-political organiusation after the cold war, but it can easily be reverted. America is the senior partner in NATO, if a country wants to leave they need to give not to America to leave the alliance.I explained this on Quora. NATO requires unanimous approval so a LOT of capability to "blackmail" Finland and Sweden exists. Of course garbage Western MSM talks about all of this as Turkey playing both sides but that is wrong. Turkey has had problems with Sweden and Finland for years. I am copy pasting from my Quora post.
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This question became a magnet for weird content on Quora and especially on Twitter. I have to clarify a few things first
1- “Turkey should be kicked out of NATO.”
NATO has no member expulsion mechanism and even if did Turkey wouldn’t be expelled. With its good defense industry, large military, militaristic culture (means an endless supply of men during a war) and very strategic location it is easily one of the five most important members of NATO. Also, it has been a member for 65+ years. I know some jingoistic people especially from some European countries love screaming “kick Turkey out” or “sanction Turkey” on every occasion they get but what I am writing is the reality. The US and UK would laugh at this proposal even if NATO had a member expulsion mechanism.
2- “Turkey can not prevent Finland and Sweden’s NATO accession.”
No. It can. Membership requires unanimous approval. Greece blocked North Macedonia’s accession for 10 years.
After addressing these I can answer the question. I think it won’t but it will require concessions in return. Turkey did a similar thing in 2009 against Anders Fogh Rasmussen’s bid for the position of general secretary. The reason was the same as today. It was his support to the PKK and his general anti-Turkish policies. Turkey stopped vetoing him in return for 3 important missions in NATO.
In international politics everything has a price and the price is determined by the opposing sides' negotiation power. Turkey currently has a lot of negotiating power against Finland and Sweden since it can block their NATO membership. Considering that it has disputes with these two countries it is not going to miss this opportunity to position itself better in the said disputes. No smart country would. Especially Sweden’s open support to PKK, a terrorist organization that is responsible for the deaths of 40000 Turkish citizens since 1980, must be addressed. At least things like these should stop happening.
It would be messy and embarrassing, but any political objections Turkey holds can easily be overcome. The only trump card they hold is their membership. Because of their geographical location and the presence of nuclear assets Turkey is an important NATO ally. If it wasn't for that they wouldn't be needed.
North Macedonia is a completely different situation to the one we have today. NM weren't under imminent military invasion, so America was happy to let the bilateral political game play out. If they were, America would be happy to sour relations with Greece if need be. Unlike Turkey, Greece doesn't offer much to NATO.