Do we become Christ?

For some reason, Protestants are offended when we say that we become Christ.  On one forum, when I quoted the Catholic doctrine which says:

795 Christ and his Church thus together make up the "whole Christ" (Christus totus). The Church is one with Christ. The saints are acutely aware of this unity:Let us rejoice then and give thanks that we have become not only Christians, but Christ himself. Do you understand and grasp, brethren, God's grace toward us? Marvel and rejoice: we have become Christ. For if he is the head, we are the members; he and we together are the whole man. . . . The fullness of Christ then is the head and the members. But what does "head and members" mean? Christ and the Church.Our redeemer has shown himself to be one person with the holy Church whom he has taken to himself.
Head and members form as it were one and the same mystical person.  A reply of St. Joan of Arc to her judges sums up the faith of the holy doctors and the good sense of the believer: "About Jesus Christ and the Church, I simply know they're just one thing, and we shouldn't complicate the matter."

I got a very sarcastic and insulting response:

What a bunch of pious poppycock coming out of the degenerate mouths of papal pinheads.  WE DO NOT BECOME "CHRIST HIMSELF!"

Have you (and they) absolutely lost your mind?! You have taken the "oneness" that the Bible speaks of and morphed it into a wholly ridiculous idea that Jesus never once advocated. The pervasive and perverted language of Catholicism knows no bounds, but always tries to cloak itself with religious sound-bites that are pleasant to the ear. Non-thinking persons will fall for it every time because they have chosen to check their brains in with the Vatican hat-check girl.

Do you agree with him?  Here is what the Scrpture says:

Acts 9:3-5
King James Version (KJV)³And as he journeyed, he came near Damascus: and suddenly there shined round about him a light from heaven:  ⁴And he fell to the earth, and heard a voice saying unto him, Saul, Saul, why persecutest thou me?  ⁵And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks.

Saul persecuted the Church. But Christ says that Saul persecuted HIM.  Therefore, Christ does not see the Church as separate from Him.  It is a mystery.  But that doesn't make it wrong.  It is simply something we can't explain.  However, when we become members of the Church, we become members of Christ, Himself.

What say you?

Sincerely,

De Maria