A Problem for Preterism

Here is a reason why we know the Antichrist will be here in the future when Jesus returns:

“and then the lawless one will be revealed, whom the Lord will destroy by the breath of his mouth and wipe out by the manifestation of his Parousia.” (2 Thess 2:8)

When Jesus returns for his Parousia, the man of lawlessness will be active on earth.

If the preterist objects and insists, for example, that Titus was the man of lawlessness, then point out that Titus died in AD 81, not AD 70, the period when preterists claim the Parousia occurred.