The USSR lasted 74 years. The progs can last just as long by stacking immigration like they are doing.
The Muslims will turn on the progressives too, as soon as they no longer need them in the role as useful idiots in helping to take down the West.
Nope. This coalition will tear itself apart.
The desire for power will not overcome jihadis versus gays and women, hispanics versus blacks, etc.
The Soviets had the benefit of a common ideology backed by white Russians with guns.