Would this be considerable secular evidence for the existence of Jesus?

The fact of the existence of Christianity is enough. The fulfilment of Old testament prophecy tells me of his existence apart from the writings of the New Testament. The fulfilment of New Testament prophecies also are evidence that Christ is alive and well and soon to return to this earth. It requires faith seeing that doubters are more likely to want to keep proving that he did not exist because if they do, then they do not have to follow any of his teachings. Read the whole Bible and see the God Guided message it contains. Profane history is not an exact science and revisionists ply a lively trade.