The founders didn't invent the idea of God-given rights - they merely RECOGNIZED it! It's a fact whether you recognize it or not. Just the fact that you put so little credence on our founding documents is very revealing.
I thought that's what you said the Bible was for.
The founders recognized biblical authority as well as God's sovereignty over all nations.
And since you're so fond of finding a single quote and thereby claiming it proves your entire proposition, how's this one from Jefferson: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants."
Yes, it gives the fight much more authority when you know that God is the giver of the rights you are defending. That automatically means anyone who tries to steal them is a tyrant and an usurper who must be opposed.
By the way, Jefferson attended church in the chambers of Congress and used the USMC band for worship - didn't someone tell him about the separation of church and state?
Not very much like liberty is handed to people on a silver platter, is it?
God gives it to us but it must be defended and fought for because evil godless men will try to steal it and lord themselves over the people - like the ACLU and the secular humanists are doing today.