Jesus takes the time to warn the nation
of Israel and the Gentiles during the
Tribulation....

"And except those days
should be shortened, there should no
flesh be saved: but for the elect's sake
those days shall be shortened. Then if
any man shall say unto you, Lo, here is
Christ, or there; believe it not. For there
shall arise false Christs, and false
prophets, and shall shew great signs and
wonders; in somuch that, if it were
possible, they shall deceive the very
elect." Matthew 24:22-24

Jesus speaks to Israel telling them not to
be fooled or taken in by false christ's.

Once again they will be tempted to turn
away from the true Christ their Lord to
another who will deceive them into following
him instead.

They will need to stand true to Christ and to
the Word of God. By knowing the real Jesus
so well that a false Jesus' cannot fool them.