<<You are committing the logical fallacy of grouping several separate events into one, when that is not the case.>>
Exactly! From their questions, the disciples probably lumped them (judgment on Jerusalem and world judgment) together as well. Jesus straightened them out by separating the two. One would occur before the generation then living passed away; the other at a future unknowable date.
Two separate judgments; one preceded by days unparalleled trouble/vengeance upon the Jews, that would be local, you could flee Judea to escape, hopefully not in winter or with suckling infants in toe; the pecise moment of which you could know and anticipate and run from.
The other judgment would happen on a single day, worldwide, snare on the entire earth, occuring in normal, marrying and working times, unknowable impossible of anticipation, impossible to flee from, some taken from their beds, fields etc. others left.
Jesus made it very clear that His presence (parousia) would not accompany the judgment on Jerusalem to deliver anyone; no secret presence; when His presence on earth would happen, it would be obvious and earthshattering.
Excuse the grammar.