“Nazis are all bad because they all want to murder large numbers of people. Not all Muslims want to do that.”
Many Nazis, like many Muslims, simply went along to get along. There were career and business opportunities that they would miss out on if they were not party members (or believers), so the ambitious often said what benefited them.
Many Nazis, like many Muslims, were raised in an environment dominated by propaganda and indoctrination, and didn’t think that the movement was about bad things like killing people - they were misled with positive spin about their ideology, while they were also being taught to hate.
Many Nazis, like many Muslims, were intimidated by the harsh repression they were subject to, and capitulated or turned a blind eye out of fear and self-preservation. The explicit repression in Islam is actually more harsh than it was within the Nazi Party - 100% death to anyone who tries to leave or exercise independent beliefs - although it is less efficiently administered.
Most Nazis were not in the elite SS which did the executions, just as most Muslims are not in the jihadi terrorist groups, so they did not expect to actually have to kill anyone themselves.
Killing Jews (and non-Muslims generally) is a widely popular concept among wide swathes of the Muslim population throughout the world today, it is publicly preached by many Muslim clerics, and it is explicitly commanded in the Quran. Most Nazi Party members did not learn of the secret plans to exterminate Jews, until they were well underway, and well after the Nazi Party had consolidated totalitarian power and instituted a police state.
The problem is with the ideology. Individuals will always vary widely within any large group - even Nazis. Schindler was a Nazi who saved thousands.
If an ideology inclines toward, encourages or commands evil, it is evil, and deserves to be identified as an evil influence.
That’s a very sound comparison that you make, I can’t argue aginst it.