The others aren't just prepared to murder Wilders. They want to abolish democracy and replace it with sharia law, and kill the Untermenschen i.e. the unbelievers.
Please don't try and conflate Islamic fundamentalism and the Nazis.
Untermenschen does not mean "the unbelievers" it means "the under-man"
The American who first used the term in the context of inherent inferiority, which is how we understand it, said thusly:
"This term is The Under-Man the man who measures under the standards of capacity and adaptability imposed by the social order in which he lives."
That same year, he also published The New World of Islam where, if you glance at the chapter titles, you'll notice he calls Muslims "Bolsheviks."
Unsurprisingly, this is the same label that the Nazis attached to the Jews in an effort to slur them.
(And no, Bolshevism and communism are not the same as national socialism. The Nazis weren't commies.)