In a world without God...

[Brakeman]

And how do you know the same can't be said of your Jesus?

Promises and prophesies. The promises that the 'other gods' made are empty. The prophecies made by the other gods prophets have failed.

The bible says if one prophecy does not come true, that man is to be considered a false prophet. I have personally taken up the promises of the God of the bible and have looked into them and found them to be true.

You didn't look very hard. These jesus promises aren't true:
And Jesus answered and said to them, “Truly I say to you, if you have faith and do not doubt, you will not only do what was done to the fig tree, but even if you say to this mountain, `Be taken up and cast into the sea,’ it will happen. “And all things you ask in prayer, believing, you will receive.” (Matthew 21:21-22 NAS)

Ask and it will be given to you; seek and you will find; knock and the door will be opened to you. For everyone who asks, receives; and the one who seeks, finds; and to the one who knocks, the door will be opened. (Matthew 7:7-8 NAB)

Again I say to you, that if two of you agree on earth about anything that they may ask, it shall be done for them by My Father who is in heaven. For where two or three have gathered together in My name, I am there in their midst. (Matthew 18:19-20 NAS)

And whatever you ask in my name, I will do, so that the Father may be glorified in the Son. If you ask anything of me in my name, I will do it. (John 14:13-14 NAB)

If you remain in me and my words remain in you, ask for whatever you want and it will be done for you. (John 15:7 NAB)

Mat(23:36) "All these things shall come upon this generation."
Jesus predicts the end of the world within the lifetime of his listeners.

Mark 9:1 And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen the kingdom of God come with power.

John 1 1:51 "Ye shall see heaven open, and the angels of God ascending and descending upon the Son of man."
Jesus falsely prophesied that Nathaniel would see heaven open and angels descend upon Jesus. Nathaniel never saw it; neither has anyone else. (SAB)

Mat 26:64 Jesus saith unto him, Thou hast said: nevertheless I say unto you, Hereafter shall ye see the Son of man sitting on the right hand of power, and coming in the clouds of heaven. (SAB)

There are more verses of where jesus referred to non-existent scriptures and contradicted old testament scriptures.. but I think the point is well made.

Jesus was so false he wore false eyelashes!