Some have suggested that the "Catholic Church" or the "Vatican" or the "Holy See" has in the past blamed Jews for the crucifixion of Christ.
Interestingly, the evidence is contrary. Between the years 1566 until 1992 the Catholic Church had just one "official" catechism (book explaining beliefs). This book, the Roman Catechism, had this to say on the subject:
"This guilt seems more enormous in us than in the Jews, since according to the testimony of the same Apostle: If they had known it, they would never have crucified the Lord of glory (1 Cor. 2:8); while we, on the contrary, professing to know Him, yet denying Him by our actions, seem in some sort to lay violent hands on Him."
-Catechism of the Council of Trent
Reasons Why Christ Suffered under "Suffered Under Pontius Pilate"