“they were not Greek”
Jewish historian Josepheus claims the Trojans were Jewish.
Roman historian Diodorus said that there were three Israelite exoduses from Egypt; one going to the Greek isles.
Jewish tradition indicates that perhaps 80% of Hebrews didn’t leave Egypt with Moses. The ones remaining may not have been well-liked and decided to go elsewhere.
I don't believe Josephus claimed the Trojans were Jewish. He did claim that the shepherd-kings (Hyksos) were the Israelites, which isn't correct.
16. This is Manetho's account. And evident it is from the number of years by him set down belonging to this interval, if they be summed up together, that these shepherds, as they are here called, who were no other than our forefathers, were delivered out of Egypt; and came thence, and inhabited this country, three hundred ninety and three years before Danaus came to Argos. Although the Argives look upon him as their most ancient King. Manetho therefore bears this testimony to two points of the greatest consequence to our purpose: and those from the Egyptian records themselves. In the first place, that we came out of another country into Egypt: and that withal our deliverance out of it was so ancient in time, as to have preceded the siege of Troy almost a thousand years. But then, as to those things which Manetho adds, not from the Egyptian records; but, as he confesses himself, from some stories of an uncertain original, I will disprove them hereafter particularly, and shall demonstrate that they are no better than incredible fables.
I don't think Diodorus said there were three separate instances of Israelite Exodus from Egypt.