It's basically saying stop fighting Assad and let him deal with Isis.
Nowhere it says let's have deals with him or with his allies Iran which is pushing it very far.
Iran has long standing economic agreements with Russia. This year Trump signed off on the nuclear accord with major world powers which sees the lifting of sanctions on Iran, which would benefit Russia, who USA currently has sanctions against, and obviously boost Iran's economy. The deal was already drawn up during Obama administration. US government said the reason for the deal was to improve diplomacy. No way it would have been agreed without any financial benefit to the US. Obama is not the warm and fuzzy type.
https://www.cia.gov/library/readingroom/docs/DOC_0000381440.pdf