Funny you say that and imply that he was anti-Christian too. Think less about who sold and more about who bought; they knew what they were buying after all, and it is way less poisonous when compared to the real drivel thrown at us by the left-wing establishment even going back to Berlins heyday.
Jewish only in the ethnic sense of the word
Mr. "Berlin" (not his real name) was born was of Russian Jewish ancestry. That is factual assertion ... Do you claim it is false?
Mr. "Berlin" did not, as an adult, practice the Jewish religion. That is also a factual assertion ... Do you claim it is false?
I'm not implying that he promoted secularism in place of Christianity. I'm stating it explicitly, and I offer his own work as evidence. If you like, I'll beat on Bing Crosby for that execrable dreck "Silver Bells" as well ... and in his case, it's even worse: he was nominally Christian.
real drivel thrown at us by the left-wing establishment
"Well, they did it too!"
Garbage is garbage, and obscuring Christian holidays with secularist dreck is anti-Christian. Doesn't matter who's doing it, I'm still against it.