because only the Truth will set you free
Second, I am a retired Army Chaplain
Third, I am endorsed by a Baptist denomination
Fourth, I have been a Bible teacher for over 30 years.
Having said that, this author is all wet. There is a difference between truth claims and the truth. The author has claimed a number of things which are just not true, using the old straw man argument. For instance, the claim that Baptists teach that you are saved by prayer is just one example of a number which demonstrate a misunderstanding of the truth.
I highly recommend you check some other sources. You have stirred up a hornets nest with this misunderstanding.
God is unchanging, we know that that is the truth. How was Abraham saved?