The PCA was originally established when about 10% of the mainline Presbyterians in the southern branch broke away.
I’m afraid some of the old mainline establishment, moderate, get-along-to-go-along types still remain. Sad.
True. Some PCA churches were formed because they had political rather than theological differences with the mainline denominations. Then there is the constant effort by Satan to infiltrate and destroy the true church. That is universal.