[little jeremiah]

If you want to shift the discussion from private workplaces to schools, ok, but that is a totally different arena. So which article of the Constitution is being violated?

"This is either a federal mandate or a preemptive move by HP to avoid a future lawsuit. It all boils down to a federal imprimatur for homosexuality that is going to affect every corporation."

As stated by Aquinasfan.

[Looking for Diogenes]

The unconstitutionality I'm referring to are laws/judicial decisions forcing acceptance or normalization of homosexuality such as the law in CA mandating "gay" friendly promotion cirriculum in public schools K-12 since 2001.
"So which article of the Constitution is being violated?"
...It all boils down to a federal imprimatur for homosexuality that is going to affect every corporation.

I'm not sure that that is true, but even if it were how is that unconstitutional? Where in the U.S. Constitution does it say that employers must accomodate the prejudices of their employees?