That seems to be how God has set it up - and why.
When there has been a global totalitarian coup to install a world government that is strategically and systemically pursuing evil under the flimsiest and most incoherent of rationales (birdemic, climate change, antiracism, sexual revolution) - Yet Most People Do Not Notice (and deny the obvious when it is pointed-out)...
When this is the situation, when someone has-accepted the mainstream modern (self-contradicting) basic premises of a universe without purpose or meaning; then persuasion, argument, reason, logic, evidence are all utterly powerless.
I think the best we can then do, in practice, is negative...
We can Not Encourage/ Support evil in others.
We can Not join-in with the assumptions behind the social interactions on the birdemic and peck and other Litmus Test issues (as they arise).
Because to encourage sin in others, to normalize sin - to make it an unconscious habit - is (surely?) the worst of sins.
Not to do so, may be all that we can usefully do.
(And even that little is, in practice, difficult.)