I don't understand why Chad Gaya is a passover song. I've asked when I heard it sung, and the only answer I got was something like "because there were goats in the shetl." (the "kid" is a kid goat) That hardly explains a particular association with Pesach. Just a tradition, I suppose.

I can't see the Yorkshire Yankee's links now, but Go Down Moses was a spiritual sung by Afro-American slaves and version number 2 in the DT has a verse about Jesus. So on 3 April I gave a link to the verses I thought more suitable to sing at a Jewish holiday occasion.