There's too much to say to answer that, that it's not really possible to do so in a satisfactory way on here. But in brief:
Arguments for general theism:
- There is something rather than nothing, and yet that "something" has not existed eternally, meaning that it came into existence, and yet the universe is an impersonal and materially contingent reality so it is an unsatisfactory explanation for its own existence.
- The laws of physics and chemistry are regular and predictable, yet there is no obvious reason why they should be.
- The laws of physics just happen to exist within perfect ranges for supporting life (the probability that the universe should be just one big hydrogen cloud or one massive black hole is incomprehensibly high, the odds that even elements should exist are minuscule).
- Even though there are approximately 10^60 planets in the universe, the odds that any single planet could support life, when multiplied by the number of planets in the universe, are still vanishingly small.
- Biological molecules are the most complex entities in the universe and yet they all somehow managed to develop together, with increasing, mutually supportive quantum leaps in complexity, to be able to not only encode information, but also self-replicate, sanitise information errors, build proteins based on those DNA templates, and do so within protective casings, all in conditions that are incredibly hostile to life.
- Human beings have the ability to appreciate truth, beauty, and goodness on a level that most would describe as spiritual, that does not have a satisfactory explanation in pure biological terms.
- Human beings across all of history have believed in a God or gods, and that propensity towards belief in higher powers at the very least requires a reasonable explanation.
- Human societies function best when they are religious, and fall apart when they arent.
- We have never been more materially prosperous than we are right now, and yet as we abandon religion our society is getting less happy.
Arguments for Judeo-Christian theism:
- The Bible was written across an approximately 1500 year period by several different authors and yet the central theological themes are unchanged, in fact they develop and enrich as the revelation unfolds. Prophecies from books written from the period of 1200 BC to 300 BC are intricately fulfilled in the life of Jesus.
- The above point would be most adequately explained by Jesus being a complete work of fiction, but this does not gel with the historical evidence. There is ample evidence that Jesus was not only a real person, living in a real place, at a real time, but the evidence of the mark that he made on the people around him is observable in the historical record.
- The earliest followers of Jesus were best placed to know if it was a lie, and yet they lived lives of poverty and persecution to share their faith.
- The best explanation for the fact that Christianity exists at all is that it is true, if it is false the key people (plural - as opposed to say Mohammed who was just one guy) would have had no incentive to continue and every incentive to abandon it.
- Christianity's rise has coincided with remarkable good fortune across history, both in how the religion itself survived and spread but also the prosperity it brought with it to the places where it took root.
- Those who read the Bible with an open heart have experiences unlike the reading of any other book.
- The teachings of Christianity make sense of the human condition and following the moral code of the Bible makes individuals and communities better places.
There's literally a whole library worth to say on this issue, and each of the points that I have made above is a book in its own right... but there's a start.