“Recep Tayyip Erdogan’s main formal claim to Sweden and Finland was their loyalty to the Kurdistan Workers’ Party (PKK), which is recognized in Turkey as a terrorist organization, as well as to the “Gulenists” – Ankara has been raiding for many years those it considers followers of the preacher Fethullah Gulen and accuses them of organizing a coup attempt in 2016. About 100,000 Kurdish refugees have found refuge in Sweden.”
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“Clarifying the wording of the compromise memorandum between the three countries, UK newspaper the Guardian noted that Finland and Sweden have promised not to “support” the Kurdish Democratic Union (PYD) and the Kurdish People’s Self-Defense Forces (YPG). And according to the Turkish pro-government daily newspaper the Daily Sabah, the memorandum also states that “Finland and Sweden commit to preventing activities of the PKK and all other terrorist organizations and their extensions, as well as activities by individuals in affiliated and inspired groups or networks linked to these terrorist organizations.””
https://www.yahoo.com/news/why-turkey-unblocked-nato-enlargement-140600724.html