Ever? No. Whether or not it's moral to support the state under which you live depends entirely on the circumstances. In the best case the state is mostly an expression of the will of the nation, and if your country is invaded you support the state.

But even if the state is parasitical, in the case of an invasion it's usually moral to support it.

It is usually morally correct to fight off literal tyrannical invasion, what are you on about?

Are you seriously suggesting it wasn't moral for the French to fight the Nazis or the people of Afghanistan to fight off the Soviets and Americans?

>You should support yourself and bide whatever state imposes itself on you.

Pathetic. Might as well go back to feudalism with that attitude.

It is not nationalism to want a sovereign nation that you have influence over, that's democracy.