TL;DR You cannot be a nationalist because you simply do not belong to any group, if you're incel then you're excluded. Fighting for a group you're excluded from is cucked.
These stormfrontcels worship a romanticized
abstract idea of "their" nation, just like with their oneitis, the truth is that neither give a single fuck about them, if anything would want the incel dead.
Yet like SOYcuck whiteknight SIMPS they will stand up like the white birdcel meme "Hey! do not touch her!"

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I mean quite literally, stormfrontcels LARPing about how "we should protect" white w*men from BBC migrants. The same white w*men who avoided you, blocked you, talk shit about you in HS and literally all your life if you're incel.
White people hate you, you're excluded, they don't see you as part of their tribe, that's why you're sitting here posting from your bedroom while they go out and have sex, they didn't invite you, you make them uncomfortable.
How can you even say you belong anywhere, when you don't have your own family household, children, what stakes do you have in "your" country? You're no different than a wandering Jew or gypsy. They deny you that, they say you
shouldn't have a family, or own a home, or have a job, they ostracize you for your views, they take that away from you, make it clear you do not belong.
I could never imagine myself holding a weapon and putting myself in front of these people to protect them, any incel who does would start leaking liters of soy from their newly developed manboobs.