The question as written must be rejected because accepting it requires agreeing that there is some contingency in the existence and eternal attributes of God. Of course, that is contrary to all sound theology. In fact, the Bible teaches the eternal self-existence and independence of God from all of creation. Rather than being contingent on anything, all things are contingent upon Him. One of the best passages concerning this is in the Gospel of John, in which the apostle speaks of the eternal Logos:
"In the beginning was the Word, and the Word was with God, and the
Word was God. He was in the beginning with God. All things came into
being through Him, and apart from Him nothing came into being that has
come into being. In Him was life, and the life was the Light of men.
The Light shines in the darkness, and the darkness did not comprehend
it." (John 1:1-5)
Jesus was the eternal Logos who became flesh and dwelt among us (John 1:14). He was not a statement (as someone suggested) that could be falsified, but rather the eternal Truth, the Truth prior to all other truth making possible all knowledge:
"Jesus said to him, 'I am the way, and the truth, and the life; no one
comes to the Father but through Me.'" (John 14:6)
It simply doesn't make sense to assert that the truth, whose essential nature precludes the possibility of being false, could be falsifiable.
However one thing that I find remarkable about this question is that it also suggest that there is some evident reason to doubt God's existence and his eternal attributes. That strikes me as odd because history has always confirmed the Word of God and continues to do so. Everything that we see today is as the Bible said that it would be:
"Know this first of all, that in the last days mockers will come with
their mocking, following after their own lusts, and saying, 'Where is
the promise of His coming? For ever since the fathers fell asleep, all
continues just as it was from the beginning of creation.' For when
they maintain this, it escapes their notice that by the word of God
the heavens existed long ago and the earth was formed out of water and
by water, through which the world at that time was destroyed, being
flooded with water. But by His word the present heavens and earth are
being reserved for fire, kept for the day of judgment and destruction
of ungodly men." (2 Peter 3:3-7)
Man in his rebellion against God has mounted up reason after reason to incur His wrath, and the Bible affirms that wrath is exactly what we should expect to find in the world:
"For the wrath of God is revealed from heaven against all ungodliness
and unrighteousness of men who suppress the truth in unrighteousness,
because that which is known about God is evident within them; for God
made it evident to them. For since the creation of the world His
invisible attributes, His eternal power and divine nature, have been
clearly seen, being understood through what has been made, so that
they are without excuse. For even though they knew God, they did not
honor Him as God or give thanks, but they became futile in their
speculations, and their foolish heart was darkened. Professing to be
wise, they became fools, and exchanged the glory of the incorruptible
God for an image in the form of corruptible man and of birds and
four-footed animals and crawling creatures." (Romans 1:18-23)
However, in spite of the fact that the depravity of man leaves no reason to expect God's mercy and love, He demonstrated his love by making the greatest sacrifice of all, i.e. the crucifixion of his only begotten Son:
"But the LORD was pleased to crush Him, putting Him to grief; if He
would render Himself as a guilt offering, He will see His offspring,
He will prolong His days, and the good pleasure of the LORD will
prosper in His hand." (Isaiah 53:10)
"For while we were still helpless, at the right time Christ died for
the ungodly. For one will hardly die for a righteous man; though
perhaps for the good man someone would dare even to die. But God
demonstrates His own love toward us, in that while we were yet
sinners, Christ died for us." (Romans 5:6-8)