Catholics are Bible-believing Christians:
"These books [the Bible] are held by the Church as sacred and canonical, not as having been composed by merely human labor and afterwards approved by her authority, nor merely because they contain revelation without error, but because, written under the inspiration of the Holy Ghost, they have God for their author, and have been transmitted to the Church as such." (First Vatican Council, Sess. III, Dogmatic Constitution on the Catholic Faith, Chapt. 3, "On Faith", 1870)
Catholics and Protestants both cherry-pick scripture to support their beliefs, because the Bible can be read to say almost anything you want. See Romans 3:28, which Protestants point to ("Therefore we conclude that a man is justified by faith without the deeds of the law"). Then see James 2:24, which Catholics point to ("Ye see then how that by works a man is justified, and not by faith only"). Luther ignored any part of the Bible that disagreed with Paul (Romans), so he called James an "epistle of straw".