Given the ultra-nationalism, fervent movement toward cultural purity, and support for persecution of gays and non-Christians, and relegation of women to second-class citizenship, I think that Mr. Santorum really needs to re-examine which party more closely resembles the 1920s NSDAP.
And this is before I include the fact that they welcome avowed white nationalists, holocaust deniers, and conspiracy theorists into their ranks with open arms now.