You are kind of loose with your "church" term. There are approximately 38,000 different "church" sects, and with many killing each other over time. As for the "mystery", Yeshua came to be a light, whereas he brought the mysteries to light, and yet, he noted Isaiah, in saying there will be those with eyes, who cannot see. This lines up with Daniel 12, whereas the wicked/lawless will not understand. There are basically 2 churches, the church of hell, church of lawlessness/gospel of grace, led by Satan, whose message is you surely shall not die (Genesis 3:4) (1 Corinthians 15:51-52), and the message of the son of man, which is the message of the kingdom, which starts in the day of the LORD, which remains behind the door.(Matthew 24), whereas "immediately after the tribulation", comes the sign of the son of man, and the gathering together of the elect. Your rapture doctrine, stemming from some British teenager around the 17th century, is a doctrine of men, and is reputed in Matthew 13:30, whereas the church of the tares, the church of the devil, will be "first" gathered and thrown into the fire (great tribulation), and then the wheat will be gathered after. It was the Lord who chose 3 shepherds, Peter, Paul, and Judas per Zechariah 11, whereas the two "staffs", Peter and Paul would be used to pasture the "flock doomed for slaughter", which is the "Christian" church, established by the beast with two horns like a lamb , the Roman emperor Constantine in 325 AD at his convened Council of Nicaea, and who glorified Peter and Paul by building them each a basilica. Per Joel 2, there will be those in Jerusalem and on Zion who will "survive/escape", for they will flee when they see the "abomination of desolation" in the holy of holies" (Matthew 24;15-16). It will be the "elect" which are sealed to protect them from the four angels of Revelation 7, and the elect will be chosen from the 12 tribes of Israel, starting with Judah/Jews. As for Zechariah 12, that follows Jerusalem being a cup that causes reeling to the people around for coming against Judah and Jerusalem. That occurred in 1967 and 73, during the Israeli wars. It is in that day "that I will set out destroy all the nations which come up against Jerusalem. That day is described in Hosea 5 & 6, whereas Judah and Ephraim have been under punishment for 2 days (2 thousand years), and after those 2 days, on the 3rd day Judah and Ephraim will "acknowledge their guilt". We are now in the 3rd day, but that event has not happened as of now. As for your term "Messiah"/Christ/anointed one, all judges, priest, prophets and kings of Israel are anointed. God does the anointing by way of his anointed, which would preclude the self anointed.