There are those that say that big rebbes knew how to transform a non jewish song into a ruchniyusdke song.
Also, some tunes by themselves can be kinda less kosher to even an unsuperpro ear. Without lyrics. There are tunes that are slightly better and with the help of added jewish lyrics dont have the same effect. This is only about the basic conscious not-too deep level.
Besides that theres many different opinions people mention, here (lots of threads) and coffee rooms all over, about what can make a song bad. IIRC:
A) composed by Less Kosher Person
B) originally sung by LKP
C) The above but not when redone by jew
D) anything after 1950
E) Dylan may be ok plus he’s really jewish
F) Lyrics need soap
G) Pushes a culture and way of life (especially for fans) which is off base
H) A tune or beat that negatively effects a person
I) One direction
J) idk im tired
People argue how to treat what they hold as non jewish if it gets used by a frum jew. Think that sums it up. For more info search the cr there must be at least 5 threads about this