I know there were so far two times of abomination of desolation events.
Will there be a 3rd? Good question. Not yet as it has to do with defiling the temple of God by offering sacrifices to an idol, or another god being worshipped in a holy place of the Lord God. There cannot be any true temples made with stones of a holy place where God is anymore. Cause if true there is lot's of NT scriptures get broken. Saved people are the only true temple of God today, so if someone has departed from Christ, they had not been granted by God to come to Christ, and never had him living in them ever. Those who believe have Christ dwelling in them and they have been sealed by the Holy Spirit for the day of redemption of the purchased possession.
The FAKE believers, Christ tells them I never know you.
Matthew 7
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23
And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
John 6
34 Then said they unto him, Lord, evermore give us this bread.
35 And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.
36 But I said unto you, That ye also have seen me, and believe not.
37 All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
38 For I came down from heaven, not to do mine own will, but the will of him that sent me.
39 And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.
41 The Jews then murmured at him, because he said, I am the bread which came down from heaven.
45 It is written in the prophets, And they shall be all taught of God. Every man therefore that hath heard, and hath learned of the Father, cometh unto me.
46 Not that any man hath seen the Father, save he which is of God, he hath seen the Father.
47 Verily, verily, I say unto you, He that believeth on me hath everlasting life.
61 When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?
62 What and if ye shall see the Son of man ascend up where he was before?
63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
64 But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.
65 And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.
66 From that time many of his disciples went back, and walked no more with him.
67 Then said Jesus unto the twelve, Will ye also go away?
68 Then Simon Peter answered him, Lord, to whom shall we go? thou hast the words of eternal life.
69 And we believe and are sure that thou art that Christ, the Son of the living God.