A lot of "truthers" unfortunately get led astray into various false paths and dead-ends, due to a lack of guide (the Catholic Church).
Many "truthers" who are good on various cօռspιʀαcιҽs (the Jєωs, Illuminati, Freemasons, etc.) as you describe unfortunately get led astray due to various teachers out there, who assign fault to the Jesuits for example. They throw the Jesuits and The Vatican in there with all the other bad guys.
It's sad, because these guys started out innocent and with good will, and possibly are STILL good willed, but unfortunately they've been duped, objectively speaking. And now they think the Catholic Church is part of the conspiracy to "deceive humanity", and thus part of the enemy that must be fought.
It's actually quite frustrating.
The first starting-point for anyone who would seek the truth is GOD, who can neither deceive nor be deceived. And by many rational arguments, we know that God wants to be worshiped and there is only ONE way to worship God, that Jesus Christ is a historical figure, God and man, Who came and redeemed us and did something no other man had done, namely rising from the dead. And it was THAT miraculous start that caused the Catholic Faith to spread throughout the world, the work of 12 uneducated, blue-collar men. And unlike Islam (for example) they didn't spread the Faith with the sword, which would be a good human cause or explanation. The spread and growth of the Church was miraculous? you bet. And it doesn't end there -- the continued existence and SURVIVAL of the Church over the past 20 centuries also bears out its claims to be the one Church founded by Christ. And then there are the countless miracles and holy men and women, fruits of holiness, that have sprung from the Holy Catholic Church over the centuries...
It is only by starting there, that there is one God, whose Son redeemed us and set up a Church, that we have any hope of navigating all the deceptions out there, set up by men and the fallen angelic intellects (devils).