I suggest you look up the Greek word translated elect in Matthew 24:31.
It does not refer to Israel but to the saints, those saved by their trust in Jesus.
Consider the word "elect" used
in Romans 11:1-11 (namely, v.7):
[The Remnant of Israel]
1I ask, then did God reject His people? Never may it be! For I also am an Israelite, of
the seed of Abraham, of
the tribe of Benjamin.
2God did not reject His people,
whom He foreknew [that is, in OT times]. Or do you not know what the Scripture says in Elijah, how he pleads with God against Israel:
3“Lord, they have killed Your prophets, they have torn down Your altars, and I alone have been left, and they are seeking my life”
a?
4But what
was the divine answer spoken to him? “I have left to Myself seven thousand men, who have not bowed
the knee to Baal.”
b
5So then also, in the present time, there has been a remnant according to
the election of grace.
6And if by grace,
it is no longer from works; otherwise grace no longer would be grace.
c
7What then? What Israel is seeking, this it has not obtained, but the
elect obtained
it.
And the rest [/remaining ones / remainder (a Grk related to v.5's "remnant" word)] were hardened, [
https://biblehub.com/text/romans/11-7.htm ]
8as it has been written:
“God gave them a spirit of stupor,
eyes not to see,
and ears not to hear,
unto this very day.”
d
9And David says:
“Let their table be for a snare and for a trap,
and for a stumbling block and for a retribution to them.
10Let their eyes be darkened not to see,
and their backs bent over forever.”
e
[The Ingrafting of the Gentiles]
11I ask then, did they stumble that they might fall? Never may it be! But in their trespass
is salvation to the Gentiles, so as to provoke them to jealousy.
Do you see
v.7's ^ use of the related word
"ELECT" (a
noun, "
G1589 -
ekloge... rather than the
adjective "
G1588 -
eklektous" used
in Matt24:31 -
https://biblehub.com/text/matthew/24-31.htm ) to be referring to
anyone other than "those
of Israel WHO BELIEVED" (since the text goes on to say "
but the REST [/ REMAINING ONES / REMAINDER] were hardened..."--the "REST" of JUST
WHO is this referring to specifically here?)
Can you see how in THIS context,
"elect" refers specifically to "
the elect OF ISRAEL" (
those of Israel WHO BELIEVED)? whereas the "rest" (the ones of Israel who did NOT believe) were "hardened [G4456 - verb]"
[V.25 "blindness [/a hardening - G4457 - noun] IN PART has happened
TO ISRAEL *UNTIL*..." ; where this "IN PART" is equivalent to "the REST [/ remaining ones / remainder]" (
of Israel)
in v.7 who were "hardened [G4456-verb]"]