Archeology has certainly been affected by unscientific intellectual fashions: take the post-WW2 marginalization of mass migration hypotheses, which happened as a reaction to Nazism, not on the basis of any scientific evidence. It took the ancient DNA revolution (i.e. being embarrassed by outsiders who could prove the archeology consensus was wrong) to correct this purely political scientific bias. (Note that historical linguists generally continued believing in mass migration all along though.)