According to Russia, the United States intends to create a new quasi-state in the territory east of the Euphrates, which will be controlled by the Kurds. It is on this territory that the units of the American army, including artillery, which provide direct support to the Kurds, are stationed.
In this sense, the interests of the United States and the SDS coincide: the first intend to divide Syria, using the captured territory as a springboard for further war against Damascus, and the second have been dreaming about their own state for so long. The important point is that the area controlled by the Kurds is extremely rich in oil. Its mining and sales allow the VTS to get so much from the Americans weaponsas required