Anytime you deny the acknowledgement of God you are undermining the entire basis for which our country exists.
America promotes a lot of bad things, you know. Same-sex marriage, for example.
But in the long term, I think it is improper to limit your future.
If God gives you rights, no man and no government can take them away from you.
Acknowledgment of God is not now, or ever has been, a violation of the US constitution.
The basic premise of the Constitution was a separation of powers and a system of checks and balances because man was perceived as a fallen creature and would always yearn for more power.