Mr. Waddell is incorrect when he asserts that there can be no freedom from religion.  What Mr. Keavy was advocating was the right to freedom of conscience which is the constitutional right of every citizen to decide FOR THEMSELVES how she/he will live her/his life. 
Christians have the right to speak about what they believe and non-Christians have the right to disregard what they say about their beliefs. Likewise for the Christian when the non-believer shares her/his beliefs. The rub that Keavy was referring to is the problem, and it's a serious one for Christians, of them believing that their fellow citizens can be forced to live according to the tenants of the Christian faith. Christianity is the majority religion in the U.S. and Christian politicians use their public office to force non-religious Americans to live according to that religion. See, for example, Trump's discriminatory exemption of women's reproductive health from mandatory coverage by insurance.  Much trouble's ahead.