9/11 Congress singing of God Bless America on the steps of the Capitol, why did no one raise a stink?

When Tower attacks happened 10 years ago, that evening on the steps of the Capitol, Congress stood on the steps and belted out an A cappella version of God Bless America. For those who staunchly believe in the separation of church and state, believing all legislators should conduct themselves in a non-religious manner. Having them singing a song acknowledging God, (I know some will try to water it down to say “whose god?”, or that is was their personal god, but the intent of the composer is quite clear), on the steps of government, one would think someone have made a stink. Were those who advocate separation of church and state too shell shocked to stick by their guns? Did they not have TVs and missed that broadcast? Because of the tragedy, they found it in their hearts to be benevolent enough to allow the little Congressmen and women have their song?