It is easy for a Christian to fall down the conspiracy theory rabbit hole with how much the Mainstream media lies to us. However, the answer is not to embrace hypotheses that might or might not be true and to make one particular group in power to be the bane of all evil.
The truth is we as The Body have had an enemy and do have an enemy that has always existed since he fell from heaven. His name is Satan/Lucifar the Devil. The majority of those spouting conspiracy theories are in under his evil hierarchy by denying God and The Atonement on the Cross that Christ provisioned for them.
This is why pretty much all Conspiracy Theories end up blaming The Evil Jewish Bankers. Making the true enemy very happy as he attacks God's Chosen People the Jews and their Nation Isreal for all the ills of the world. Rothschild; if he was the person that was financing the Bevarian Illuminati was not doing so because he was Jewish.
If anything he was spitting in Jehovah/Yahweh's face turning his back on his Jewishness and becoming anti zionist just like the Conspiracy Theorists that hate those darn rich Jews. Ones Jewish religion should never be blamed; if there even is or was a true group of conspirators getting behind evil acts.
However, I am convinced it is wrong to even be spending ones time looking into what might be a true conspiracy because ultimately they all go back to the evil that was birthed by The Evil One. Evil and true Satanism did not start with any specific secret group it is natural to the depraved heart of all men that have not chosen to repent and believe in response to God's Free and Simple Grace.
The World under Satan, your own Flesh and and The Devil all really do conspire together to make sure you never hear and repent from hearing The Gospel in this Church Age. They want to bring you down into the hell with them which they know they will eventually go when Christ returns. They want you not to be Raptured and not to inherit the Kindom. Nor make it onto the New Heaven and New Earth.
The answer is to stay in God's Word and to keep your eyes on the true and beautiful things of above not of The Earth. Do not get dragged down the conspiracy road. The majority having delusional and wrong beliefs does not require a large scale conspiracy. Simply depraved hearts and heads ignorant of God's True plan for the Church Age.