I was aware of this 2007 incident, and of an earlier controversy over a Hindu invocation in the House in 2000. But I’d never seen footage of the incident until the video showed up on my Facebook wall a couple of days ago (very belatedly).
The protesters, who you can hear praying and quoting scripture off screen, were Ante and Katherine Pavkovic and their daughter Christan, members of Operation Rescue. (From North Carolina, I understand–former stomping grounds of mine.) The cleric whose meditation they interrupted was Rajan Zed, from Nevada. Just to make things a little more interesting with an eye to religious pluralism: Zed had been invited to serve as guest chaplain by Harry Reid, a rather rare Mormon Democrat.
This was the first time that a Hindu had been invited to serve as the Senate’s guest chaplain. Some Christian Right organizations and publications objected to the Hindu invocation on the grounds that Hindus don’t worship the Christian or Judeo-Christian God acknowledged by the Founders.