I think the idea here is exactly the same idea expressed by Jeremiah prior to the destruction of Jerusalem and Judea by Nebuchadnezzar, in several waves around 600BC. The idea really being that form and procedure, ('religion' if you like), are worthless and become actually an abomination, if the heart of a person is in fact far from God.
6: 20 Of what use to me is frankincense that comes from Sheba,
or sweet cane from a distant land?
Your burnt offerings are not acceptable,
nor are your sacrifices pleasing to me.
I Disagree, The Scripture Below "Strongly Suggests" A Future Temple In Jerusalem
Isaiah 66:1-4 below strongly suggest a future temple to be built in Jerusalem, and animal sacrifice being renewed, in Abomination to the finished work on Calvary
You will closely note the word "Delusion" used only 2 times in the KJV, both in relationship to a temple, and appear to be the same event of "Delusion"?
Isaiah 66:1-4KJV
1 Thus saith the Lord, The heaven is my throne, and the earth is my footstool:
where is the house that ye build unto me? and where is the place of my rest?
2 For all those things hath mine hand made, and all those things have been, saith the Lord: but to this man will I look, even to him that is poor and of a contrite spirit, and trembleth at my word.
3
He that killeth an ox is as if he slew a man; he that sacrificeth a lamb, as if he cut off a dog's neck; he that offereth an oblation, as if he offered swine's blood; he that burneth incense, as if he blessed an idol. Yea, they have chosen their own ways, and their soul delighteth in their abominations.
4
I also will choose their delusions, and will bring their fears upon them; because when I called, none did answer; when I spake, they did not hear: but they did evil before mine eyes, and chose that in which I delighted not.
2 Thessalonians 2:3-11KJV
3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first,
and that man of sin be revealed, the son of perdition;
4 Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that
he as God sitteth in the temple of God, shewing himself that he is God.
5 Remember ye not, that, when I was yet with you, I told you these things?
6 And now ye know what withholdeth that he might be revealed in his time.
7 For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
8 And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:
9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
11 And for this cause
God shall send them strong delusion, that they should believe a lie:
12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
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2
1
1
(i.e. from having been 
