Jesus returns because God brings Jesus back. Thus proving that Jesus isn't the great God.
1 Thessalonians 4
14For if we believe that Jesus died and rose again,
even so them also which sleep in Jesus will God bring with him.
Titus 2
13Looking for that blessed hope, and the glorious appearing of
the great God and our Saviour Jesus Christ;
Jesus doesn't return under his own power, similar to how Acts says Jesus didn't go to heaven under his own power. This is why Jesus is brought back the same way he was taken:
Acts 1
11“Men of Galilee,” they said, “why do you stand here looking into the sky?
This same Jesus, who has been taken from you into heaven, will come back in the same way you have seen Him go into heaven.”
nope read again as this single verse refutes your false claims.
2 Thessalonians 2:8
8 Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by
the appearance(epiphenia
) of His
coming(parousia
);
Above we see both words are combined to the singular event- the 2nd Coming of Christ.
Peter refers to Christ as our God and Saviour- Lord and Saviour just the same as Paul in
Titus 2:13 and it’s the same Greek construction in
Titus 2:13 as it is in
2 Peter 1:1and
1:11.
And the One who is coming / appearing in the NT is always the Son and NEVER the Father
epiphanea
2 Thessalonians 2:8
8 Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by the appearance of His coming;
1 Timothy 6:14
14 that you keep the commandment without stain or reproach until the appearing of our Lord Jesus Christ,
2 Timothy 1:10
10 but now has been revealed by the appearing of our Savior Christ Jesus,
2 Timothy 4:1
I solemnly charge you in the presence of God and of Christ Jesus, who is to judge the living and the dead, and by His appearing and His kingdom:
2 Timothy 4:8
8 in the future there is laid up for me the crown of righteousness, which the Lord, the righteous Judge, will award to me on that day; and not only to me, but also to all who have loved His appearing.
Titus 2:13
13 looking for the blessed hope and the appearing of the glory of our great God and Savior, Christ Jesus,
Titus 2:13
Of our great God and Saviour Jesus Christ tou megalou Theou kai sooteeros Ieesou Christou. This is the necessary meaning of the one article with Theou and sooteeros just as in
2 Peter 1:1,
11. See Robertson, Grammar, p. 786. Westcott and Hort read Christou Ieesou.
Parousia
Matthew 24:3
3 And as he sat upon the mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? and what shall be the sign of thy coming, and of the end of the world?
Matthew 24:27
27 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
Matthew 24:37
37 But as the days of Noah were, so shall also the coming of the Son of man be.
Matthew 24:39
39 And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.
1 Corinthians 15:23
23 But every man in his own order: Christ the firstfruits; afterward they that are Christ's at his coming.
1 Thessalonians 2:19
19 For what is our hope, or joy, or crown of rejoicing? Are not even ye in the presence of our Lord Jesus Christ at his coming?
1 Thessalonians 3:13
13 To the end he may establish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all his saints.
1 Thessalonians 4:15
15 For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.
1 Thessalonians 5:23
23 And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ.
2 Thessalonians 2:1
2 Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,
2 Thessalonians 2:8
8 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
James 5:7
7 Be patient therefore, brethren, unto the coming of the Lord.
James 5:8
8 Be ye also patient; stablish your hearts: for the coming of the Lord draweth nigh.
2 Peter 1:16
16 For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty.
2 Peter 3:4
4 And saying, Where is the promise of His coming? for since the fathers fell asleep, all things continue as they were from the beginning of the creation.
1 John 2:28-29
28 Now, little children, abide in Him, so that when He appears, we may have confidence and not shrink away from Him in shame at His coming. 29 If you know that He is righteous, you know that everyone also who practices righteousness is born of Him.
And
2 Thessalonians 2:8 links both His appearing / coming as the same event of Christ not the Father. Both epiphenea and parousia together below in the same verse.
2 Thessalonians 2:8
8 Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by the appearance of His coming;
1 Peter 1:7
7 That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:
Conclusion : This is where Unitarians really fail badly because they are so consumed with disproving the Deity of Christ that they fail with a well rounded theology which would benefit them greatly . You see how all biblical doctrines fit together seamlessly and especially in this case prove beyond all doubt that the one and only Person Paul was referring to in
Titus 2:13 as God was Jesus and not the Father for He is never once in Scripture referred to as the One who is Coming/ Appearing .
hope this helps !!!
