Therefore God sends them a strong delusion, so that they may believe what is false, in order that all may be condemned who did not believe the truth but had pleasure in unrighteousness. But we ought always to give thanks to God for you, brothers beloved by the Lord, because God chose you as the firstfruits to be saved, through sanctification by the Spirit and belief in the truth. (2 Thessalonians 2:11-13)
He sends them a powerful delusion, because they didn’t believe in his son? That hardly seems fair. After all, it seems he specifically sends this delusion to make them believe a lie. A thought that God couldn’t lie? And doesn’t he want everyone to be saved? If he really did, why would he send a delusion?
God is not a man, that he should lie, nor a son of man, that he should change his mind. Does he speak and then not act? Does he promise and not fulfill? (Numbers 23:19)
3 This is good, and it is pleasing in the sight of God our Savior,4 who desires all people to be saved and to come to the knowledge of the truth. (1 Timothy 2:3-4)
God does want everyone to be saved, yes. And he also can’t, but can, lie; he can do anything, however, he’s not human. Thus he wont lie. As for the passage in Hebrews (Hebrews 6:18) that talks about two things God can’t lie about; that is also true. He isn’t human, he’s God, thus he can’t lie while at the same time being able to do so… My ways are higher than your ways, and all that (see Isaiah 55:9). – But now then. We haven’t addressed why God would send a delusion to delude those he wanted to save.
It’s possible to classify the whole world into two categories: objects of mercy, and objects of wrath. As an example, the Pharaoh who kept the Israelites captive was an object of wrath. Almost everyone in Sodom and Gomorrah was an object of wrath.
22What if God, desiring to show his wrath and to make known his power, has endured with much patience(A) vessels of wrath(B) prepared for destruction, 23in order to make known(C)the riches of his glory for vessels of mercy, which he(D) has prepared beforehand for glory— (Romans 9:22-23)
God wants everyone to be saved. This doesn’t mean he forces salvation upon people. In fact, some people are objects of his wrath and have been destined for destruction. Everyone chooses their own fate in a manner of speaking: God controls everyone “free will”, but everyone still has that “free will”:
In his heart a man plans his course, but the LORD determines his steps. (Proverbs 16:9)
The point being this: all people can be saved; but not all people will be saved (at least, while they’re on Earth. Nobody really knows if we can be saved in Hell or not.).
You are Loved!