Outspoken critic of Sister Aimee; he was upset that she drew many of his church members away.
Many times he slandered Aimee Semple McPherson in his pulpit, on the radio, and in print, for one practice or another, and was a key reason investigations into her kidnapping were flipped from finding the kidnappers to accusing her of faking the whole thing. Shuler fulfilled the following prophecy, and no doubt was cast down when he died.
10 For the accuser of our brethren is cast down, which accused them before our God day and night (Rev.12)
Shuler was privy to Constable Ash's testimony and called that respected police officer a liar in so many words:
Transcript
Then appeared Constable Ash of the Arizona desert, another man who, upon Mrs. McPherson’s re-appearance, declared her desert story absurd and ridiculous [THAT IS A LIE], but who since that time has been given the privileges of the 'fight the-devil' fund and came to the witness stand to tangle himself into a veritable web of contradictions in an effort to extricate the lady 'evangelist.' ("Miss X," p. 93. Notice his quotes around Evangelist; he couldn't even give Sister Aimee that.)
Constable Ash wasn't contradicting himself nor making things up. There was an entire police department that assisted him in investigating Sister Aimee's kidnapping, and every bit of it was confirmed, which was reported in the San Bernardino Daily Sun (June 27, 1926), Madera Tribune (August 18, 1926), and Redland Daily Facts (October 29, 1926).
Yes, Bob was a defender of the KKK. He was the kind of person who generated controversy like a combustion engine generates exhaust; it wasn't a byproduct of his ministry, it was his ministry.