Obviously the mystery of iniquity is still at work today, in this world. We live in a sinful world. The mystery of sin itself, is exactly that, a mystery. Why God allows sin to exist, why he allowed it to enter the world. The only guess that I can make is that even sin has a part to play in God's unrevealed divine will, and that it will play a part in ultimately glorifying God.
However, the mystery of lawlessness is not the man of lawlessness.
The mystery of lawlessness/iniquity/sin is exactly what it says it is: a mystery.
The man of lawlessness existed in the time of Paul
2 thessalonians 2:6 you know what is
restraining him now so that he may be revealed in his time.
scripture does not say satan was now being restrained before he would enter a human and turn him into the man of sin, it says the man of sin was now being restrained.
Paul does not explain in this letter what/who is doing the restraining. He only states that he told them and that they knew what/who was doing the restraining. And it/he was restraining the man of lawless in the time of Paul.
2 thessalonians 2:5-6 Do you not remember that when I was still with you
I told you these things? And
YOU KNOW what is restraining him NOW so that he may be revealed in his time
Exactly which verse in 2 thessalonians 2 boldly states that God is sending the man of lawlessness?
2 thessalonians 2:7 The coming of the lawless one is
by the activity of Satan with all power and false signs and wonders,
However, it does say God sends a delusion so that they will be believe what is false, IN ORDER that they may be condemned.
2 thessalonians 2:11-12 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
Now why would God send a delusion, almost forcing those to believe what is false? In order to condemn them. But is it fair for God to that? How could God then find fault?
Romans 9:19-23
You will say to me then, “Why does he still find fault? For who can resist his will?”
20But who are you, O man, to answer back to God? Will what is molded say to its molder, “Why have you made me like this?”
21Has the potter no right over the clay, to make out of the same lump one vessel for honorable use and another for dishonorable use?
22What if God, desiring to show his wrath and to make known his power, has endured with much patience vessels of wrath prepared for destruction,
23in order to make known the riches of his glory for vessels of mercy, which he has prepared beforehand for glory—
Who are the vessels prepared for destruction? unbelieving Israel, which was about the be destroyed.
Romans 9:27-28 And Isaiah cries out concerning Israel: “Though the number of the sons of Israel
c be as the sand of the sea, only a remnant of them will be saved,
28for the Lord will carry out his sentence upon the earth fully and without delay.”
29And as Isaiah predicted,