The recent threat from Turkey of a military operation in northern Syria has unfolded at the same time as the country set requirements for approving Sweden's and Finland's NATO applications.
The resistance is, among other things, about relations with Kurdish militant groups.
The guerrilla organization PKK is branded terrorist by Turkey as well as Sweden and the EU.
But President Recep Tayyip Erdogan wants the outside world to stamp the YPG on terror, which he has also threatened to attack in a possible offensive.
"One of the cards the Turks can play to invade our territories is to use NATO applications to pressure the United States and NATO to give the green light to attack our territories," Mazlum Abdi, commander of the Syrian Democratic Forces (SDF), told SVT.
IS can benefit from Turkish attacks
The YPG is a large part of the SDF, which in its fight against the terrorist group IS has received support from large parts of the western world.
Abdi, who himself is on Turkey's list of wanted terrorists, warned today that NATO talks and possible concessions to Turkey could also have consequences for the possibilities of resisting IS in the region.
"When we are busy retaliating against the Turkish attacks, there may be gaps in the detention camps that IS can take advantage of, while we are busy at the front line against Turkey, if they start a military operation," he says.
Abdi further assures that Sweden's support for the SDF is only political and moral, but emphasized the importance of it remaining.
- If Sweden backs away from the fight against IS and to support us by making concessions to Turkey, it means concessions not only from Sweden but from the international community.
[It would] strengthen Turkey's position to step up further in the area.