Of course gould is obviously one of socialist liebrals that believes the
constituion actually mandates a wall of separation between church and state.

Wrong. Again. As usual. Gould believes that the Constitution prohibits public
resources, (such as the tax money paid to fund public schools) from being used
to establish or promote any particular religion. Forcing all the kids in a
school to observe the holidays of any specific religion, say the prayers of any
specific religion, etc, clearly demonstrates an intent to "establish" an
official, government sanctioned religion for the school.

It's all about religious freedom, and not even about Christianity vs. the rest
of the world. There are several sects of devout Christians who do not celebrate
Christmas.