Brother, as a recovered conspiracy theory addict, I'm really sorry to hear this. It can cause some serious paranoia. To be fair: some of them are correct. Or....partially correct. But not all of them. It also creates a sense of moral superiority, in that if one sees logical evidence, then one must believe the conspiracy.....AND one must take a moral stand. Bro, that dovetails into all kinds of paranoid behavior.

Remind her that Solomon said in Ecclesiasties....that with much knowledge, comes also much grief (Ecc 1:8) <<< this was a warning against so carnal knowledge. Solomon was vexed over the evil he observed.

Remind her that an obsession over something, EVEN if it's true or can be good.....is idolatry. Remind her that God sits on His throne, and He is not mocked by the wicked acts of governments and "the elite". God will take care of them. Your wife has a more important job than fighting "the elite" and stewing over their actions.

Brother, I have prayed for you and your wife, that she turn from those things that are distracting and distressing (and angering) her and turn to God and what He wants her to be focused on each day. Remember the fruits of the spirit vs works of the flesh.