17 This is how love is made complete among us so that we will have confidence on the day of judgment: In this world we are like Jesus. 18 There is no fear in love. But perfect love drives out fear, because fear has to do with punishment. The one who fears is not made perfect in love.
Think about this. We don't love God because we are afraid of God. We love God because God first loved us. We love God because God sacrificed to rescue us from ourselves.
If we implore people to follow God so that He will not torture them for all of eternity, then they will obey out of a selfish desire to protect themselves. They won't obey because of love and they certainly won't sacrifice to love others. I believe this is why we have so many who claim the title Christian but do not look like Jesus.
Let us call people into obedience, but first we must introduce them to the God of Love who is pursuing them and desires to save them.