You are stretching ancient mythology to the point of snapping! Much of what you're citing sounds like it was gleaned from extremely unreliable sources. If you do your own research, instead of relying on the shoddy research of others, you'll realize the game is a little more difficult.
The entire Old Testament points to Jesus as the Messiah. The law of sacrifice, the brazen serpent, the priesthood and prophecy all pointed the way to Christ. (See Isaiah 53.) If one reads the New Testament, the apostles make this case with many compelling arguments. Plus Moses and Jesus have one crucial thing the mythologies don't have, and that's witnesses. "In the mouth of two or three witnesses shall every word be established." Not only Moses, but 70 elders of Israel, Joshua and a few others, saw God. The people also witnessed the parting of the Red Sea. And in Jesus' day, three of the apostles saw Moses and Elijah transfigured on the mount with Jesus. Hundreds of his disciples saw the resurrected Jesus and even more saw the many miracles he performed. Then Saul, one of the most zealous opponents of Peter and the Christians, had a vision on the way to Damascus and created a stir among the Christians, Jews and Romans, and he became one of Christianity's most avid champions.
Another problem is that if you look at each of the examples you used, the primary portion of Horus' and Dionysus' lives have nothing to do with the major points of Jesus' life. Horus and Dionysus were not crucified and subsequently resurrected, though Osirus was, and later traditions combined the persons of Horus, his son, and him. Isis was reputed to be his mother, though so was Hathor. The miracle of virgin birth is not unusual in ancient lore. Quetzalcoatl was said to have been a bearded white god, born of a virgin, killed and resurrected. But there also is some evidence that he may have been a Christian himself, or more. Neither Horus nor Dionysus took upon themselves the sins of the world and suffered for mankind's sins. As for the city of bread reference, c'mon, bread was the primary food staple in that region. It's like saying Samson and Heracles came from the same mythoplasm. Dionysus was captured by pirates while sleeping, and when he awoke the pirates laughed at him. Suddenly, grape vines sprang from the deck and wild animals appeared. Dionysus grew in size and the terrified sailors threw themselves into the sea. Fortunately, the god was compassionate and changed the pirates into dolphins. Julius Caesar also was kidnapped by pirates. Was his life simply based on that of Dionysus? As for the December birthdates, surely you know that Jesus was not born in the winter, but that Roman Christians simply adopted the Festival of Saturn as "Christmas" to make conversion easier. It is more likely that he was born near the day of Passover, another type and shadow of Christ.
Jesus is the king of kings and the lord of lords. He also is the great I AM of scripture and the God of Israel, and judge of mankind. He also promised to one day return and usher in a new era of peace and righteousness.
