Clearly (to real Christians) the PCUSA is not Christian and certainly not Biblical. They are Liberal.
Liberalism is Satan's compromise with sin whilst pretending to be church. This enables Satan to draw in the gullible, blind and ignorant to impersonate and portray church, but in effect is no more than false church.
Religion finds a place in the heart and mind of the reprobate but it produces a counterfeit religious response and nominal Christians. PCUSA is like the Episcopalian/Anglican, RC 'church' and many others in various denominations.
As soon as we see them deleting Bible verses and going in the direction of the world we can perceive false and blind people alienated from God.