Make no mistake, I've warned you now - If any church or denomination, man or woman, rejects the Holy Spirit - they will then serve and succumb to the Unholy Spirit, the spirit of the Antichrist, gone out into all the world. All will, in the end and even now, be filled with the Holy Spirit or the Unholy Spirit of  Satan. "Little children, it is the last time: and as you have heard that Antichrist  shall come, even now are there many antichrists; whereby know that it is the last time". Does 33,000 separate denominations, not even including the Catholic church, count as "many"? Each one claiming they are Christ's representatives on earth? I think so! Remember - in almost all of them, the Holy Spirit is not welcome. How do we know who is antichrist? Not only do they reject the Holy Spirit, they reject us, who are born of Him! We who love truth and welcome the Holy Spirit "They went out from us, but they were not of us, for if they had been of us, they would have continued with us: but they went out that they might be made manifest that they were not all of us". This scripture, in 1 John 2, exposes the bedrock of denominationalism - there was then, and there is today, a genuine, Holy Spirit bred and raised people of God, under Apostolic and Prophetic leadership, united by their love for God and one another and everyone partaking of the Body and Blood of our Lord and Savior Jesus Christ - all filled with the Holy Spirit, all gifted by him to minister to all, remnant though we may now be - and we who are of this, His actual Body on earth, we the "called" and the "called out ones", know who is of the antichrist because they will not fellowship with us. Now understand - Satan, in his deception, convinces those who "are not of us" that we are the ones not of God, while they are the ones obedient to and following God's will. But remember to taste their fruit, bitter though it may be. THEY will hate US and even kill us, believing they are doing God a favor (they ARE doing their God a favor, the god of this world, Satan). WE will love them, and forgive all who will not fellowship with us, showing genuine love for all who hate us "Be not shaken in mind, or be troubled" at these words my brethren "Let no man deceive you by any means, for that day shall not come (that day when He shall appear in the clouds in flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ), the gospel that I have been preaching to you with lo, these many words, and that day "when He shall come to be glorified in His saints, and to be admired in (not by) all them (us) that believe (because our testimony among you was believed) in that day". Indeed, in that day "Behold, I will make them of the Synagogue of Satan (the thousands of denominations and churches that rejected the Holy Spirit choosing to follow Satan instead, because he promised to exalt them and glorify them - (flesh! flesh!, all is carnal flesh, in Satan's kingdom) which say they are Jews (slash Christians) and are not". Remember, many confess "Lord, Lord" but do not know Him. Many shall "come in My name, and deceive many".  but do lie. There you have it, as plain as can be - they are liars when they say they are God's people "behold, I will make them to come and worship before your feet, and to know that I (Jesus Christ) have loved thee". Everyone that kills us, either with hatred within (their hearts) or without (their hands), everyone that accused us of being of the Devil, will hear Jesus himself personally telling them - these are mine, these truly loved me, even unto death (of reputation, of popularity, of finances, etc. as well as physical). These loved Me to the end and never forsook Me. These will abide with Me forever.
But before this day comes, it will not come "except there come a falling away first, and that man of sin be revealed, the son of perdition" - a state of final spiritual ruin, loss of the soul; damnation - the future state of the wicked. Now listen - because what God says here about him, this "son of perdition", is exactly what every church on earth that accepts the Name of Jesus but not the person of Jesus, manifested among us by His most Holy Spirit, is doing - they are simply following in their Father's footsteps "who opposeth and exalteth himself above all that is called God (and all that is of God) or that is worshipped, so that he as God sitteth in the temple of God (men's hearts) shewing himself that HE IS GOD". He doesn't just come against Christianity, he repudiates all religions, all that is worshipped and demands that all mankind worship him as God and they will do so because he will "pose as a man of peace, he will use flatteries, and "he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand (the common laborers) or in their foreheads (the intellectuals, the ruling class), and that no man might buy or sell, save he that had the mark, or the name of the beast or the number or his name (666)" - he will do this for their own good, he will say, he will do this to bring peace and unity to the whole world, to benefit and bless the world, he will say, but his real motive is to bring the whole world under his dominion and will, for he will "show himself that he is God". He will even come after the working of Satan, Satan's very own "Christ", with all the power and signs and lying wonders at his disposal and all the world's peoples will believe him because they "received not the love of the truth that they might be saved". "And for this reason God shall (and is even now) send the strong delusion (like He did to Pharaoh) that they should believe a lie", "that they might be damned who believed not the truth, but had pleasure in unrighteousness". Selah.