I just don't know why people can't just deal rationally with this sort of thing.  There are many religions, belief systems, etc.  All important to those that believe.  If someone from a particular group wants to get up and give a positive invocation-christian, wiccan,humanist-let them do it. Or do away with the invocation altogether; problem solved. The idea that anyone, but especially a public employee, has a right to showcase his or her religion only and further, foist it on people who are not religious is not only ridiculous but speaks of a sense of entitlement, arrogance and a generous dollop of narcissism: 

"I  think I have a right, as an elected official, because I'm Christian, I'm Catholic, all my decisions stem from my core belief, and I think I have a right to have people give an invocation and a prayer," Gilman said..."

Really? That's some bucket of special rights your public office confers on you. And only you.