One place I see an unfortunate amount of division within the Church is when it comes to who is "allowed" to preach the truth. Can we promote charities that aren't in line with our faith? Can we work with unbelievers to achieve a common goal? Can we support politicians whose faith is questionable? (This one is especially problematic, as those who answer "no" often ironically end up supporting opposing politicians whose faith is antithetical to our own). I see it a lot: If a non-Christian does something good, some Christians will brush it off with "yeah, but they're still not Christians".
Here's the question: Why should it matter? Obviously, in the grand scheme, it matters. If someone isn't saved, God Himself will forget their good deeds and condemn them for their sins. But that's His job after they die. For us who remain on the earth while these people are still doing good, we ought not fear them doing good.
To really drive this point home, consider this: Paul had no problem with liars preaching Christ. Neither, therefore, should you. Even while Paul was in prison for preaching Christ, many selfish people were preaching Christianity and using it for their own selfish ends. Paul's response? "Christ is proclaimed, and in this I rejoice!"
So if you're not sure about that Catholic pro-life charity, stop panicking. Give them a quid or two and pray abortion will end soon. It's not a problem when David Wood teams up with the Apostate Prophet to oppose Islam. AP's presence may help free a Muslim, who may then come to Christ, and who knows? Maybe by working with AP, he himself may eventually come to know Jesus. And regardless of Donald Trump's personal faith, it cannot be denied that he was a far better president, both for America, and for the Church within, than Joe Biden. Make no mistake, whoever is not against us is on our side (Mark 9:40). Therefore, we should leave God's job to Him, and do our job: Proclaiming Christ in righteousness and truth.