You mean quoting the Bible? The article seems to indicate that the employees were either forced or encouraged to support or attend the event.
Maybe you'd find more like-minded "thinkers" in Democratic Underground?
That's problematic because even though it was probably put forth as a voluntary event it may have come across as a mandate.
As to your other point, I don't give a rat's ass where the passage came from. The point is the guy posted a quote about violently killing the type of individuals involved in this event. Whether you agree with their type of lifestyle, they have a right to go through life without being threatened with physical violence by a coworker.
And I'm talking about the legal definition of threats of violence, which this comes close to. So spare me your sanctimony.