Sadly, talking points that originate with QAnon sometimes get picked up by conservative voices that are otherwise more credible, and repeated, because they sound like things conservative-minded people would like to believe are true. There are even examples of high-profile and godly pastors who end up repeating QAnon-created "facts" because they read these things somewhere they trust.
The mainstream news media in the US (which I used to be part of) has lost much of the trust it once deserved. This is due in large part to an increasing tendency to report left-narrative-fitting stories without taking the diligence to check them, with unbiased eyes, and first make sure they are objectively true. Many people on the right have responded by embracing alternative sources of news that claim to be free of left-leaning bias or claim to be exposing a vast, left-leaning conspiracy, which is easy to imagine when you're rightfully angry.
But these alternative, conspiracy-theory-exposing "news sources" don't actually solve the problem. Sure, they take their disregard for truth in a different political direction, but they still disregard the truth. I'm dismayed. It now seems as if both sides define "truth" by whether it fits their political narrative rather than in God's way—did it actually happen?
Christians should stand for a Christian meaning of truth. If it isn't actually happening, it isn't true—no matter how nicely it might fit the narrative we'd like to promote. Especially in these times, when made-up "facts" are rampant, we should have nothing to do with nonsense like, "Well, I know that much of what comes from QAnon is probably a lie, but there's still some truth in it and much to admire about the cause, blah, blah, blah..." If the source is a liar, it comes from the Father of Lies.
So to answer the OP's question: Christians should have nothing to do with it except to denounce it. What fellowship does light have with darkness? What business does truth have mixing with lies?