MS or others can sue until the cows come home but it ain't going to change the reality on the ground. Do you really think it possible to sue linux out of existence? Now it would be like trying to claim that you owned the idea of binary logic or interrupt driven IO. Maybe you do, maybe you don't, but the world is going to go on using it regardless.
Of course not. Patents are simply a form of intellectual property, and Linux doesn't get a free pass.