My humble opinion on this controversy is simple-
A person must act and live according to what they claim to be. Therefore music like Akapella & Gershon Veroba whom clearly state on their albums that they’re doing parodies of non jewish music and are more “modern”, they are clearly singing for that type of crowd which therefore enables people who prefer not to listen to non jewish parodys to not listen & doesn’t usually interest the ultra ultra orthodox crowds- (when is the last time you heard chassidim listening to Gershon Veroba???- although I love his music myself!!!)
The problem arises when one looks chasidish or really frum, therefore really frum circles will associate with him and follow all his stuff sometimes not even noticing what a non jewish ta’am has been put into the material because “he’s one of us”. This is clearly wrong in my humble opinion for many obvious reasons…what do you think?