And at that point all you can do is undermine and destroy their trust in "reputable" western "news" organizations by hammering home their lies on the genocide in Gaza, their omissions, their distortions, and so on and that may not work because the western liberal will squirm and say 'oh but that's just this one instance, this isn't a pattern' and then you have to do the hard leg-work of digging out bad takes and bullshit from other instances and years (like the Bush years) and again some amount of bad faith liberals will squirm and say they're not ready to throw them away entirely.

The person has to be willing to be Neo from the Matrix, they have to be willing to bravely question the foundations of their reality and truth. Sometimes you can easily drop some truth bombs and examples of distortion and completely rattle someone free of the chains, other times they'll resist and resist like John Nada's friend in "They Live" and you sadly lack actual truth sunglasses like exist in that movie to force onto their face.