You are already working on the assumption that the people today are just as bad as Nazis which means you could attach any ridiculous pseudo-science to them.
Well, Hitler himself admitted that he took inspiration from the U.S. Bosque Redondo reservation for his concentration camps. Yet, America was not full of "bad" people because of how its citizen dealt with the natives.
Humans are never just "bad". But long-term "bad" situations turn normal people into monsters, and bad situations can still happen, even if I'm naïve enough to believe that we wised up a little bit since the war. Ask everyone's lovely, sweet aunt (we all have that aunt who wouldn't hurt a puppy) how they'd deal with someone who'd dare rape their daughters. You'd witness some of the most fucked up torture scenarios possible, and bear with me, our kind hearted aunts would actually do it, given the proper "push".
Give a whole country two decades of international instability, isolation, constant propaganda, fatherly figures preaching fucked up conspiracy theories and an abstract feeling of humiliation due to powers outside of the immediate perception (blame them on the population that is the least capable of defending itself in public, easy). Wait for a few years, your country would be filled with "good" people who turned into our lovely aunts in constant berzerk mode.
Antisemitism in Europe isn't a result of terrorist attacks committed by Jews. It is a result of pre-existing hatred of the Jews for the execution of Christ and how people perceived Jews hording the wealth of their countries. Unlike the other Abrahamic religions, Judaism isn't above asking for interest. The violence is part of Nazi propaganda that Zionist do ritualistic human sacrifice and dip baby blood into their bread. No such fabrication is needed to convince people that Muslims are violent.
In the context of nazi Germany, the argument of terrorist attacks was mostly replaced by the communism threat (The Tzars spent a lot of effort trying to discredit jews, blaming them for the social unrest prior to the revolution. That propaganda simply traveled west, and the fact that a few jewish people did take part in the revolution served as an excuse for justifying that conspiracy theory). In essence, communism and terrorism were treated just the same : the risk of an armed group, trying to weaken a government in order to impose a foreign, alien ideology. So while jewish people never comitted terrorist attacks in Europe whatsoever, the Tzar antisemitic propaganda tied them to the communist threat in the general opinion, and that was pretty much the same for the regular Joe.
And let's be honest, Western countries didn't wait for ISIS to have tensions with muslims. Terrorist attacks are irrelevant anyway. In France, we had terrorist attacks from nationalists in Corse for DECADES, launching rockets into police stations, blowing up businesses, kidnapping business men etc. Before that, we had royalist terrorists shooting at cops and plotting to overthrow the government. We almost had a military coup by the foreign legion generals in the 60's... UK had the IRA. Italia had the red brigades. They were serious threats, much more capable in inflicting mass casualties than ISIS, and we didn't care much about them. Racial tensions may use terrorism as an excuse or a fuel for propaganda, but let's be honest, they would exist even if there was no terrorism at all.
Muslims have a bigger population than Jews. It isn't comparable.
Jewish population in Poland before the holocaust was about 9.5%. That's exactly the same proportion of muslim people in France today, for example. That's about twice the current proportion of muslims in Germany today. Having a large part of the population from a specific group doesn't automatically protects them from harm, is what I'm saying.
But then, yes, Jewish people were systematically harmed in all of the countries they were in at some point, which is not the case for muslims. That's the main big difference, but in terms of pure numbers in Western countries, the situation is not -that- different from pre-war Germany.
That is because Judaism doesn't seek coverts
Not today, but that it wasn't always an absolute rule. Judaism had a VERY long period of proselytizing too. They still faced existential threats, wether they were seeking converts or not. I don't think that this was ever connected to racial tensions whatsoever, to be honest. Immigration is far more relevant in terms of numbers and psychological effects that the anecdotical, ridiculously low muslim conversion rate in western countries. Even populist, far right parties don't really use that as an argument as far as I know.
Now, I don't think that muslim people are currently facing the same dangers the jewish people faced in nazi Germany. They may face some similar racism (to a certain degree) in some places, but not the same existential threat. First big difference, there are big muslim countries in the Arab world, in north Africa and in South Asia. Jewish people did not have big hebrew nations capable of taking action for their defense or for sheltering them, and that's a huge difference.
Yet, the comparison with the context of pre-war Germany actually stands, in terms of arguments used by far-right parties and demographic numbers in western nations.