The idea that God loves the whole world is a new idea.

For there is no difference between Jew and Gentile—the same Lord is Lord of all
and richly blesses all who call on him, for,
“Everyone who calls on the name of the Lord will be saved.”
-Romans 10:12-13

Whoever does not love does not know God, because God is love.

And so we know and rely on the love God has for us. God is love.
Whoever lives in love lives in God, and God in them.
-1 John 4:8, 16

This is how we know what love is: Jesus Christ laid down his life for us.
And we ought to lay down our lives for our brothers and sisters.
-1 John 3:16

God demonstrated His love in the most perfect way possible:

But he was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was on him, and by his wounds we are healed.
We all, like sheep, have gone astray, each of us has turned to our own way;
and the Lord has laid on him the iniquity of us all.
-Isaiah 53:5-6

Greater love has no one than this: to lay down one’s life for one’s friends.
-John 15:13

God’s Love is Salvation

Here is a trustworthy saying that deserves full acceptance:

Christ Jesus came into the world to save sinners—of whom I am the worst.

For there is one God and one mediator between God and mankind, the man Christ Jesus.
-1 Timothy 1:15, 2:5