While the above is far from "proof". There aren't any good explanations to explain these facts away.
The only correct part of that is that it’s far from ‘proof’. It is entirely unremarkable that a Jewish sect started around the teachings of an itinerant rabbi (though anything he actually said is unknown and cannot be separated from stories made up about him decades later). The beliefs that he was magical or that he was resurrected were likely enhanced by an eclipse around the time of his execution. People in the first century also believed that Nero would return from the dead (Nero Redivivus) making the story of Jesus’ resurrection even less remarkable for the time. When early Christian expectations (that Jesus would return within a generation) were shown to be an obvious failure, they doubled down and made up new interpretations, just as 19th century Christians did after the Great Disappointment. See also ‘cargo cults’ for how easily such superstitions develop into sects.