Based means different things to different people. Poland bases a lot of it's nationalism on being the victim of stronger powers, so it ties in with the Holocaust by claiming that they were gassed just like the jews were. Russia does a similar thing, they just dress up NKVD/partizan crimes as German ones. Funny enough, more of them probably did die in labor camps than jews did, but the total number of *everyone* dying in those camps (including Russian POWs) was likely 270k. For reference, American medical malpractice kills about that many Americans annually.