However, any Protestant doctrine which disagrees with Catholic doctrine also disagrees with Scripture.

DA:Yes, there are. You are misled and deceived. When you can lay down a Catholic doctrine before a Catholic and place it next to Scripture that doesn't agree and the Catholic still will not believe the Bible instead, they are blind and deceived.

All Catholic doctrine agrees with Scripture. However, any Protestant doctrine which disagrees with Catholic doctrine also disagrees with Scripture. Here are two quick examples of such.

Faith alone. Scripture says:
James 2:24
King James Version (KJV)
24 Ye see then how that by works a man is justified, and not by faith only.

Protestants reject Tradition. Scripture says:
2 Thessalonians 2:15
King James Version (KJV)
15 Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.

You've turned YOUR back on the true Jesus by worshiping a man created piece of dough and treating it as deith.

The Eucharist is the Body of Christ:
1 Corinthians 11:24-28
King James Version (KJV)
24 And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
25 After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.
27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord.
28 But let a man examine himself, and so let him eat of that bread, and drink of that cup.

You have turned your back on Jesus by trampling on His Body and rejecting the Spirit of Grace which saves you:
Hebrews 10:25-31
King James Version (KJV)
25 Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.
26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
28 He that despised Moses' law died without mercy under two or three witnesses:
29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
30 For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people.
31 It is a fearful thing to fall into the hands of the living God.

That is called idolatry and Catholics are guilty. Period.

Rejecting the Body of Christ is a form of Blasphemy which will lead to spiritual death. And Protestants are guilty:

John 6:53
Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you.

1 Cor 11:
27 Wherefore whosoever shall eat this bread, and drink this cup of the Lord, unworthily, shall be guilty of the body and blood of the Lord. 28 But let a man examine himself, and so let him eat of that bread, and drink of that cup. 29 For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.


Sincerely,

De Maria