Never heard that, thanks for posting.
I still don’t think there’s anything Communist in the lyrics of “This Land is Your Land.”
The song doesn't start turning left until you get to the fourth verse:
As I went walking I saw a sign there
And on the sign it said "No Trespassing."
But on the other side it didn't say nothing,
That side was made for you and me.
Through the years the verse was never sung. Obama had it sung at his inauguration. True!