Why do MRAs compare Feminism and Nazism?

It's not like feminists are throwing people into gas chambers!

But.. have a look at this argument.

The Nazis were around well before the heavy-duty violence and the gas chambers. And for quite some time they operated in a manner that paralleled in many ways the more recent activities of feminists.

(By making)  this comparison, it brings to the attention of people the kind of forces that gave rise to Nazism and it makes them understand a little better the horribleness of discrimination and demonisation.

Both feminism and Nazism have

• discriminated against individuals on the basis of their genetic code
• promoted the view that the targeted group was inferior genetically and behaviourally
• promoted propaganda that led to the targeted group being labelled as ‘parasites’
• promoted propaganda that led to the targeted group being constantly ridiculed
• promoted propaganda that led to the targeted group being laughed at even when mutilated
• demonised the target group by labelling them as perverts and sexual criminals
• sought to break the target group away from their families
• promoted the view that the targeted group was responsible for most of the major ills in society
• disseminated lies and disinformation about the targeted group in order to further promote their own ideology
• disseminated lies and disinformation about historical matters
• used intimidation, threats and coercion to prevent their opponents from speaking out
• promoted the lie that the privileged group consisted of innocent ‘victims’ of the targeted group
• demanded special privileges in the workplace for members of the privileged group e.g. preferential job placements for women 
• discriminated against the targeted group in educational matters and in the workplace 
• perverted the justice system so that members of the targeted group were easily discriminated against in the law e.g. in family courts
• arranged matters so that accusers from the privileged group could be shielded by anonymity in the courtroom e.g. in sex-assault cases. 
• arranged matters so that defendants from the targeted group had to ‘prove’ their innocence e.g. in sex-assault and domestic violence cases
• arranged matters so that members of the privileged group could capriciously define what, legally, was to be deemed ‘a crime’, e.g. where nowadays the ‘feelings’ of women rather than the behaviours of men are the determinants of what constitutes ‘a crime’
• arranged matters so that members of the privileged group could capriciously define how the law was to view certain matters e.g. a fetus inside a woman can now be deemed by her - at her whim - to be a worthless piece of tissue or a prospective baby - with all the ramifications of this - regardless of how the father might feel about it all (also sexual harassment, etc.) 
• arranged matters so that the law punished members of the targeted group more severely than members of the privileged group for the very same crime e.g. in domestic violence and murder cases. 
• arranged matters so that members of the targeted group were made responsible for the choices and behaviours of members of the privileged group e.g. in paternity fraud cases where duped fathers still have to pay child support
• arranged matters so that members of the privileged group who harmed, or even murdered, members of the targeted group were shown undue leniency - and were often actually applauded for their actions
• arranged matters so that the law punished members of the targeted group severely for even trivial offences, e.g. domestic violence, sexual harassment
• arranged matters so that members of the privileged group earned a right to the property of members of the targeted group for no other reason than that they were members of the privileged group e.g. alimony, child custody. 
• arranged matters so that certain speech or attitudes directed against the privileged group were criminalised e.g. biased ‘hate speech’ laws.
• punished those who protested against the prevailing ideology; e.g. for being politically-incorrect.
• effectively controlled the mainstream media and the academic institutions and arranged for them to present a dishonest and dishonourable point of view in support of their ideology
• consistently highlighted and exaggerated the achievements and the suffering of the privileged group while downplaying the achievements and the suffering of the targeted group
• ran government-funded educational courses in universities (e.g. Women’s Studies, Title IX) and in schools to promote the privileged group at the expense of the targeted group. 
• persisted in a long term campaign of hatred toward the targeted group, e.g. “A women needs a man like a fish needs a bicycle.” “Men think about sex every 15 seconds.”

Bar the heavy violence and the gas chambers - which came towards the end of the Nazis hold on power - feminism and early Nazism are rather similar.

(source)

And with regards to the Gas Chambers... Have you ever noticed how popular The Female Man is, even now, still getting new editions out, still preaching the extermination of all men, nary a critical word from Feminists anywhere... a book that, if you substitute 'Jew' for 'Man', would perfectly fit into Hitler's Final Solution?