I say Oh my god, lowercase. Its a common term. We also say holy shit, and damn!

Your question is too vague. Why not believe?

You could always give this a try.

tax taker school i went to taught "no God" but people referenced him all the time such as OMG and such and also taking the name in vain. atheists /antitheists like to say "which God" but we all know what God they are talking about, just like we all know which God your talking about. Now something for consideration? any one ever hear a person say "budda dammit" or "o my budda" or some other G(g)od in some kind of reflex reflex statement?

I believe in Jesus Christ because I think he told the truth. So that makes him God because he did accept worship and claim to be messiah

Agreed.

You believe in Jesus because you think he told the truth? You dont even know if he even lived or if he ever spoke a word that is written in the bible...btw. thousand of people have claimed to be Messiah

Because the lack of reason. If I believe something I usually have a reason for that. So what would be a reason to believe in god?

Give what a try?

There are secular historians that have analyzed this ad nauseam and the common consensus is that a figure mentioned as Jesus in the Bible most likely existed.