FWIW, we allied with Stalin to take on Hitler
Agreed. We don’t even need to be directly allied with Assad to share valuable info on ISIS. It ain’t always pretty but it is how it has always worked. After all, we once tried to kill Kaddaffi but ended up largely taming him. He was terrified of Bush.
Just a few days ago Assad offered to share info that may help capture terrorists in Europe. Meanwhile our “ally” in Turkey is raging on about insulting the prophet.