If Mel was indeed 'wrong' about the Mayans engaging in sacrificial ceremonies (and I strongly suspect he wasn't) then Estrada should've presented her case and they then could've discussed the matter. But calling Mel a 'racist' was way out of line. ....and in all likelihood a case of projection. Typical leftist behavior though -- when in doubt, call someone with whom you disagree a 'bigot' or 'racist'.
Or a Nazi.