Protestant groups tend to have the residual effects of being man-made, i.e. legalism, where they say it has to be ONLY this OR that whereas God says this AND that
Of course you are referring to the written word AND your tradition...
2Th 2:15 Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
You keep doing it to yourself...
Mat 22:29 Jesus answered and said unto them, Ye do err, not knowing the scriptures, nor the power of God.
So what is it??? Ignorance of the word of God, or willful deception???
Depending on the pastor. I cannot even guess at the number of my Protestant friends who have engaged in church shopping - and the greatest factor is the current standing or beliefs or actions of the current pastor.