Is the Catholic Christian Churches Illuminati?

No, the Roman Catholic Church was one of the original targets of the Illuminati. The 'Illuminati', was founded in 1776 by Adam Weishaupt, a Bavarian writer and scholar to oppose superstition, prejudice, religious influence over public life, abuses of state power, and to support women's education and gender equality. The organization eventually numbered about 2000 members throughout Europe.

One of the goals of the Illuminati was the overthrow of an oppressive monarchy and the control of civil authorities by the Roman Catholic Church. They were very unsuccessful in their endeavor because in 1785, that monarch, Karl Theodor, Duke of Bavaria and Prince-Elector of the Holy Roman Empire, successfully destroyed the organization and imprisoned their leadership, which ended the existence of the Illuminati.

The only Illuminati that exists today is the invention of writers and bloggers who enjoy feeding the imaginations of paranoid and naive individuals.