When 51% of the eligible voters voters cast their votes to genocide the remaining 49% percent of eligible voters (which is not what happened of course), it doesn't matter whether genocide actually happens or not to determine that it's not in fact a functioning democracy.

It sounds like a contradiction, but it's not, because the critique of a democratic society doesn't have to be limited to a decision process that leads to certain behavior, but both to the problem that triggered it and the solution that the system had produced.