They said only Nazis call it Kristallnacht, because it sounds too poetic
In Germany this is true. Most people call it Reichsprogromnacht because Reichskristallnacht is a term coined by the Nazis and it really sounds kinda poetic.
But I wouldn’t blame non native speakers for not knowing all the nuances and I don’t know how old the song is and the context makes everything clear.
The song is also a poem. It’s not a high energy exciting song like Sabaton’s usual fare, it’s just a poem with drums and guitar. You can hear every single word clearly. Is it considered appropriate to use such poetic language in poems?
Maybe poetic is the wrong word. Kristal means cristal (if not obvious) which is a shiny and very positive conotated word. The message is that destroying all the synagogues with all the violence included is a good thing because it makes Germany look better.
So would you consider this webpage in bad taste?
https://www.sabaton.net/historical-facts/kristallnacht-the-night-of-broken-glass/