People are free to opt out of this by sin, which is choosing to be cut off from God. They've un-included themselves. Nevertheless, this exclusion from salvation is by their will, not God's.
Scripture also says --- well, tagline:
13 As it is written, Jacob have I loved, but Esau have I hated.
14 What shall we say then? Is there unrighteousness with God? God forbid.
15 For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion.
16 So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.