Catholicism had its origin in the cult of the circumcision, tinkering with the gospel to make up their own gospel. Their claim to authority and infallibility is illegitimate. We note that "
the Bereans were of more noble character than the Thessalonians, for they received the message with great eagerness and examined the Scriptures every day to see if what Paul said was true." Acts 17:11 That is, Christians are to scrutinize all things in light of established scripture.
When scrutinized we find Catholic theology to be significantly deviant from scriptural theology. In fact Catholicism is about as far from scriptural Christianity as is Islam. But Catholicism has gotten away with its heresies because of this fallacious claim to infallibility and its insistence that it not be scrutinized.
It is written,
"Do not let anyone lead you astray." 1John 3:7
"Let no one deceive you with empty words" Eph 5:6
How is one to carry that out with regards to Catholic theology?
See proof
The Origin of the Catholic Apostate Church
Catholicism