Rather than liberal Protestantism being a product of Sola Scriptura as the word of God after its historical Scriptural tradition,.... they evidence rejection of the Scriptures as the supreme authority and the word of God.
I agree with this and evidenced this over the years as my work took me to various churches along the way. More distinctive in some than others but the liberal mindset has definitely impacted the whole climate of the churches....and in many we see the members attempting to fight this off....generally a "visitor" does not see this but the Lord has his people within and they do share of the unrest once they see you are a Christian.
It's a mistake to say all Protestant churches are expereincing this liberal mindset...but yes a vast majority, especially the big impact churches.
And which are seeing the greatest loss of members.