No it is not, but since no one is claiming otherwise, that's irrelevant. It doesn't stop the fact that believing something before there is evidence is foolish. It is as ridiculous to believe in undemonstrated gods as it is to believe in undemonstrated unicorns. After all, just because you can't prove unicorns don't exist doesn't mean they don't!
But I have received sufficient evidence to prove that there is a deity. First off I gained an intellectual knowledge based on the mountains of circumstantial that exists pointing to God's existence, followed by a spiritual awareness of his existence. I now have no doubt what-so-ever that he lives. I am a realist. I need evidence to believe. I have received that evidence courtesy of the Holy Ghost. I ask nobody to believe me. If you want to know yourself then you must do the same.
James 1:5-6
5 If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.
6 But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
3 Behold, I would exhort you that when ye shall read these things, if it be wisdom in God that ye should read them, that ye would remember how merciful the Lord hath been unto the children of men, from the creation of Adam even down until the time that ye shall receive these things, and ponder it in your hearts.
4 And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost.
5 And by the power of the Holy Ghost ye may know the truth of all things.