Now this might be a simplistic explanation but it will suffice. We can see evidence of this in the expressions of so many people to be unwilling to condemn anything as wrong. We want to live and let live. The Apostle is clear. This is the spirit of the antichrist, which you have heard is coming and even now is already in the world.
People are willing to accept almost anything, believe almost anything, permit almost anything.
About the only thing they are not willing to accept is the confession that Jesus Christ has come in the flesh from God. Because to acknowledge Jesus Christ is to acknowledge Him as the Way, the Truth, the Life. And that is something the world cannot have. The spirit of the antichrist is very much alive in the world. And it is necessary to be reminded that the antichrist will by definition be at work in the church.