We are very near the end of the world.

"Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and [by] our gathering together unto him, That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.” (2 Thessalonians 2:1-2) 

The Bible teaches that, near the end of the world, there would be a great falling away in the temple, that is to say, the churches.

"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; 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.” (2 Thessalonians 2:3-4) 

The son of perdition, Satan, is now ruling in the temple of God, the churches, looking like God.  Those who think they are worshipping God in the churches are really worshipping Satan.

"And no marvel; for Satan himself is transformed into an angel of light. Therefore [it is] no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.” (2 Corinthians 11:14-15) 

This is because the Holy Spirit of God has left and is no longer there to restrain Satan from ruling.  The word "let" is an old English word that means "restrain".

"For the mystery of iniquity doth already work: only he who now letteth (restrains) [will let], until he be taken out of the way. 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:” (2 Thessalonians 2:7-8) 

The Bible speaks of the churches as the house of God.  God warned that, if the house of God would not obey His commandments, which is the whole Bible, He would bring judgment on the house of God.

"[But] if ye shall at all turn from following me, ye or your children, and will not keep my commandments [and] my statutes which I have set before you, but go and serve other gods, and worship them: Then will I cut off Israel out of the land which I have given them; and this house, which I have hallowed for my name, will I cast out of my sight; and Israel shall be a proverb and a byword among all people:” (1 Kings 9:6-7)
"For the pastors are become brutish, and have not sought the LORD: therefore they shall not prosper, and all their flocks shall be scattered.” (Jeremiah 10:21) 

The Bible talks about this falling away in the book of Revelation.

"And after these things I saw another angel come down from heaven, having great power; and the earth was lightened with his glory. And he cried mightily with a strong voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of devils, and the hold of every foul spirit, and a cage of every unclean and hateful bird. For all nations have drunk of the wine of the wrath of her fornication, and the kings of the earth have committed fornication with her, and the merchants of the earth are waxed rich through the abundance of her delicacies.” (Revelation 18:1-3) 

Because the Holy Spirit is no longer in the churches, God is not there to save anyone, no matter how accurately the Bible is taught.  Therefore, God's people must get out of the churches, or be subject to Satan's rule and destruction.

"And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues.” (Revelation 18:4) 

If you are in the churches, get out.  If you are not in the churches, don't start going to church.

"And when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh. Then let them which are in Judaea flee to the mountains; and let them which are in the midst of it depart out; and let not them that are in the countries enter thereinto.” (Luke 21:20-21) 

God predicted that most people will not believe the truth about God's abandonment of the churches.

"And for this cause God shall send them strong delusion, that they should believe a lie: That they all might be damned who believed not the truth, but had pleasure in unrighteousness.” (2 Thessalonians 2:11-12)
"But evil men and seducers shall wax worse and worse, deceiving, and being deceived.” (2 Timothy 3:13)
"They say still unto them that despise me, The LORD hath said, Ye shall have peace; and they say unto every one that walketh after the imagination of his own heart, No evil shall come upon you.” (Jeremiah 23:17) 

If you are not saved, you will not be saved if you remain in the churches.  God's Spirit is saving people outside the churches.
"After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands; And cried with a loud voice, saying, Salvation to our God which sitteth upon the throne, and unto the Lamb. And all the angels stood round about the throne, and [about] the elders and the four beasts, and fell before the throne on their faces, and worshipped God, Saying, Amen: Blessing, and glory, and wisdom, and thanksgiving, and honour, and power, and might, [be] unto our God for ever and ever. Amen. And one of the elders answered, saying unto me, What are these which are arrayed in white robes? and whence came they? And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb. Therefore are they before the throne of God, and serve him day and night in his temple: and he that sitteth on the throne shall dwell among them.” (Revelation 7:9-15)