Yes, it is POWER, not ideology, that poses the danger. Professor R.J. Rummel on the topic:

The more totalitarian and less democratic a regime the more democide, the more genocide, and the greater the annual rate of democide that it commits. That is, although the independent patterns of domestic democide, foreign democide, genocide, and the others, are not correlated, together they are accounted for by a regime's totalitarian power.24 Power is the means through which a regime can accomplish its goals or whims. When a regime's power is magnified through its forceful intervention in all aspects of society, including its control over religion, the economy, and even the family, then when conjoined with an absolutist ideology or religion, mass killing becomes a practical means of achieving its ends. Thus we have the megamurderers shown in Table 1, such as the totalitarian USSR, communist China, Nazi Germany, and Cambodia under the Khmer Rouge. And thus, when the regime finds for whatever reason that the continued existence of a social group is incompatible with its beliefs or goals, totalitarian power enables it to destroy that group. Genocide follows. On the other hand, democratic elites generally lack the power to, and democratic culture anyway opposes, the outright extermination of people or social groups for whatever reason.

https://www.hawaii.edu/powerkills/HOLO.PAPER.HTM