A comment on that site says: Your information is incorrect.
This song was written in 1947
by Malka Steinberg Saks at
Camp Bais Yaakov.
It was right after the end of
World War 2 and one year
before the establishment of the
State of Israel.
Camp Gan Israel was not yet in
existence at that time.
Sherwood Goffen recorded it at
least 5 years before the Tzlil
V’Zemer Boys Choir did. I was
born in 1942 and know this for
a fact. You were probably not
yet born when this song was
written. Malka is living in Paris,
France now and is 78 years old.
She was 15 and a junior
counselor at the camp when
she wrote the song.