They were not preaching Jesus Christ & Him crucified but preaching for the supernatural sign of tongues for receiving the Holy Ghost even though they were already saved believers.
They only assume they were speaking & singing in many languages when there was no interpretation going on. What is the point when they all spoke English?
Do note how some have testified of being knocked down by the "Holy Ghost".
Proverbs 25:26 A righteous man falling down before the wicked is as a troubled fountain, and a corrupt spring.
27 It is not good to eat much honey: so for men to search their own glory is not glory.
28 He that hath no rule over his own spirit is like a city that is broken down, and without walls.
This is what happens when the Holy Ghost is the focus and the spotlight in the worship service, thus looking for a supernatural phenomenon.
They were not focusing on the Son of God for this "revival" to occur for why they were following a voice of strangers, i.e. tongues for private use as there were no interpretation..
John 10:1Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.
2 But he that entereth in by the door is the shepherd of the sheep.
3 To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out.
4 And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice.
5 And a stranger will they not follow, but will flee from him: for they know not the voice of strangers.
John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
From seeking tongues as evidence of receiving the Holy Ghost at their salvation....
Matthew 12:39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:
40 For as Jonas was three days and three nights in the whale's belly; so shall the Son of man be three days and three nights in the heart of the earth.
.....to already saved believers seeking to receive the Holy Ghost "again" apart from salvation by that sign of tongues or by the evidence of tongues....yet tongues were never to serve as a sign to believers for any thing.
1 Corinthians 14:20 Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.
21 In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord.
22 Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.
My former neighbor whom was a believer all her life that had lived across the street, changed the testimony to when she was saved to that moment when she felt the Holy Ghost come over her, giving her tongues in her kitchen reading her Bible that day. She used that moment as a sign or roof that she was saved then.
Joyce Meyers said she felt the Holy Ghost come over her giving her tongues as a sign she was called into the ministry.
In the archives of the Catholic Church in referring to one of their "church" fathers that because tongues was still being practiced within, they saw it as proof that they were still keeping the doctrines within.
They are all wrong for why that was not the Holy Spirit that came over them later in life in giving them tongues which did not come with interpretation for God to speak unto others by.
Then saved believers began seeking a continual filling of the Spirit for other signs too like for a healing as in Ernst Angeley's Healing Crusade where he would announce the falling of the Holy Ghost in saved believers to bring about miracles by tapping them on the forehead to cause them to fall backwards in a loss of self control.
Then you have slain in the spirit phenomenon, holy laughter movement, Pensacola Outpouring, and the Toronto's Blessings for other signs & lying wonders with the focus on the Holy Spirit in worship.
All of this can be seen as culminating to the event whereby an even greater apostasy shall come about in the church in these latter days and somehow after the rapture, it will be revealed as the one world church where every body could speak in tongues, lose self control for other signs and lying wonders, but by then the left behind Christians that has been led astray will finally depart from that iniquity in not joining that one world church as the beast shall make war on the saints to kill them by the sword or by starvation because the left behind saints & new believers will not take the mark to buy & sell to survive in the coming New World Order, let alone serve the beast of this One World Church.