Donald Trump, The Anti-Christ, Immorality and our Responsibility

"So, you've never sinned?" That's the snarky question people ask when Christians, who are promoting holiness in the fear of the Lord, scrutinize immorality in other Believers.  How should we handle it when others sin? What about when a Christ-professing leader sins publicly without repentance? Should we remain silent? What about Christians who support abortion and homosexual rights? We can say nothing because we too have sinned in the past? John tears apart this ridiculous defense and calls people to be more interested in God and holiness than they are in supporting others.