Lior,
Objectively speaking no it’s not. In fact the people from whom tunes such as the one we use for Shalom Aleichem were taken from were probably a whole lot worse then those that perform “non Jewish” songs these days. Those tunes were sung by people who probably thought killing Jews was just about the best thing someone could do. I happen to think Rap style music is horrible, but that’s my taste I won’t start saying that things I don’t like are “damaging to people’s souls” or whatever.
Daas Yochid,
“Refined” according to who? Jazz was considered “unrefined” 70 years ago as well.