Eugenics and euthanasia are more vehemently championed by social reformers who want human rights and egalitarianism.
You obviously didn't get the memo on what kind of reputation eugenics have had for the past half-century or so.
That the industrialized mass killings of gammas and epsilon morons occurred in the West, so enthralled by the lunacy of egalitarianism and human rights, demonstrates the pernicious danger of these false concepts inflict upon the human psyche.
Nazis who engaged in industrialized mass killings of people they considered inferior did not do so in the name of egalitarianism and human rights. On the contrary, they believed precisely in the notion of "gammas and epsilon morons" unworthy of life precisely for the lack of any belief in basic human dignity or rights.
Human rights are quite simply a set of minimum standards by which everyone, even the most "unworthy" of individuals is to be treated. They include things like a ban on torture. If you are in favor of things like banning torture, then you are a supporter of human rights.
How did such muck as National Socialism gain traction in Germany? Ein Volk, Ein Reich, Ein Fürher. How can you ignore the egalitarian rot that underlie the Nazi propaganda of government legitimacy somehow deriving from the "Volk"/people? The poison of egalitarianism began with the Revolution, giving birth to the lunacy of human rights, or rather the "declaration of rights of man and citizen," with which the gammas and the epsilon morons overthrew their betters setting-up the Terror.
Any rational human being reflecting upon the consequences of gammas and epsilon morons grasping at that which is beyond their aptitude would recognize the fallacy of egalitarianism and human rights. The accomplishments of the Terror were only bested by the Nazis in their industrial killings, which in turn were outclassed by the communist muck in Russia by a factor of 5, Maoist meatbags by over a factor of 10, and equaled by the Khmer Rouge in the Killing Fields.
People ought to know their social and political station. Superior men do not kill or hate those who are inferior; it would be as insane as man hating swine. The aristocracy did not scheme to cause more misery to their serfs because serfs did not enter into their minds. Only those who are driven by envy and insecurity born of their low station perpetuate the mass killings that baffle the rational human mind.