Article seems to be cherry picking. It’s easy to do with protestants as many mistake them for a monolithic body and then if some “church” declares the rapture is on date X using reasons y and z, then all protestants are lumped in with them. Just as the MSM likes to find a racist “church” and portray all protestants as concealing inherent bigotry etc.
The article did not criticize Protestants, since `the author is a Protestant. It was critical of a failed theological theory.