"Paul did not ever teach salvation by faith alone."
They say this based on only part of the truth.
Eph 2:8 - 10 - For by grace are ye saved through faith; and that not of yourselves:it isthe gift of God: not of works, lest anyone should boast.
Now the Key they leave off -> 10 - For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.