The Lord Has Mingled...

Isaiah 19:14-16
14 The Lord has mingled within her a spirit of confusion,
and they will make Egypt stagger in all its deeds,
as a drunken man staggers in his vomit.
15 And there will be nothing for Egypt
that head or tail, palm branch or reed, may do.
16 In that day the Egyptians will be like women, and tremble with fear before the hand that the Lord of hosts shakes over them

The confusion that the prophet indicated before will come as a result of the fact that Jehovah has mingled a perverse spirit among the Egyptians to cause them to err in their discernment. Hence the reference to "staggering" and being like a "drunken man" who does that staggering "in his vomit". The picture is not pretty at all.

The Vision suggests that even “the folly of man may serve the purposes of God” "stagger" is a Hebrew word that occurs only here and means bewilderment or dithering. Stagger (√‘āwâ): means to deviate, i.e. now go this way, now that. All this is one aspect of the holy judgment of the Lord - See for instance

1 Kgs 22:21–23;
21 Then a spirit came forward and stood before the Lord, and said, ‘I will persuade him.’ 22 The Lord said to him, ‘In what way?’ So he said, ‘I will go out and be a lying spirit in the mouth of all his prophets.’ And the Lord said, ‘You shall persuade him, and also prevail. Go out and do so.’ 23 Therefore look! The Lord has put a lying spirit in the mouth of all these prophets of yours, and the Lord has declared disaster against you.”2 Thess. 2:11
And for this reason God will send them strong delusion, that they should believe the lie,

God is spoken of in a number of places as interfering in history and acting in this fashion. It is entirely within His purview to act against the wicked.

Again, we must note the prophet’s view of the sovereign intervention of God in the affairs of men. Egypt’s fear is likened unto that of women who naturally stand trembling in a time of war because of all the tragedy and uncertainty that it brings. In the face of the Lord's powerful opposition, the Egyptian soldiers would lose all courage for battle (portrayed as a manly virtue). This is because the Lord will "mingle" a spirit of confusion in her (Egypt) that will cause these things. Thus we are forced to the conclusion that this behavior and the results of it are not accidental, nor are they incidental. God has taken a direct hand in these events on the behalf of Himself and His testimony among men and for His people.

He does not begin this sentence with a verb but with a noun, the Lord. The word is placed first for emphasis, and immediately brings us to the cause of all that has been described. It is the Lord and no other; He whom the wise of this world despise. As once men were valiant to mix strong drink (5:22), so the Lord has mixed in Egypt a spirit that brings or produces dizziness.50 The folly therefore which characterized Egypt did not come about in the “natural course of events,” nor was it accidental, but resulted from a direct supernatural judicial action pronounced against the nation. As a result of this spirit Egypt will be led astray in all its work, namely, its economic procedure, daily business, and occupation.51 What Egypt must do to live will suffer, because in the performance of this work the entire country will be led astray. This leading astray is of a most serious nature, and the prophet illustrates it by an unpleasant figure. As a drunken man stumbles about dizzily in his vomit, so Egypt will be led astray.52 Isaiah’s language is difficult to render literally, for, to make his thought more emphatic, he uses the passive form of the verb.