While 70 AD may have been history for the nation of Israel, imo, it does not include the aspect of the day of visitation that will come upon the whole world, which Paul describes this in Romans 1 and 2.
I mention this not to refute full preterism as much as to present the possibility that the day of vengeace that is omitted from Jesus’ quote is the Day Paul speaks of… a Day of reckong for all men, jew and gentile, based on the secrets of their hearts, whether they had the law or not, according to the testimony of their conscience in the light of His presence. As a Day of reckoning, rather than of "vengeance( I think Paidon demnstrated that vengeance may not be a great translation) Paul begins laying a foundation on eternal judgment for the Romans, who are a predominantly Gentile church.
Romans 1
18 The wrath of God is being revealed from heaven against all the godlessness and wickedness of people, who suppress the truth by their wickedness, 19 since what may be known about God is plain to them, because God has made it plain to them. 20 For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that people are without excuse.
Romans 2
6 God “will repay each person according to what they have done.” 7 To those who by persistence in doing good seek glory, honor and immortality, he will give eternal life. 8 But for those who are self-seeking and who reject the truth and follow evil, there will be wrath and anger. 9 There will be trouble and distress for every human being who does evil: first for the Jew, then for the Gentile; 10 but glory, honor and peace for everyone who does good: first for the Jew, then for the Gentile. 11 For God does not show favoritism.
12 All who sin apart from the law will also perish apart from the law, and all who sin under the law will be judged by the law. 13 For it is not those who hear the law who are righteous in God’s sight, but it is those who obey the law who will be declared righteous. 14 (Indeed, when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law. 15 They show that the requirements of the law are written on their hearts, their consciences also bearing witness, and their thoughts sometimes accusing them and at other times even defending them.) 16** This will take place on the day when God judges people’s secrets through Jesus Christ, as my gospel declares.
**
That Day does not fit within any historical context I kno of and imo this is the Day Jesus omitted, because it does not fit within the statement, “Today these words are fulfilled in your hearing.”