The salvation that belongs to our God is his gift to all. But sadly not all want this gift. They want to live under the delusion that they can chart their own course. They don't want to be accountable. They do not want to admit they need a Savior. We can do nothing about that except continue to proclaim the truth of God's majestic might and his glorious grace. In the end his might will be fully realized by all, and his salvation will be enjoyed by all who believe.
“Salvation belongs to our God who sits on the throne, and to the Lamb!” That's a brutal lesson for atheists, but the joyful confession of we who believe!