You don't understand the concepts of the Christian god?
I see you prudently omitted the expression
either all his life, or for the 2-3 yrs that he is supposed to have been active; which of those is not fully clear
which was in the original passage that inspired my comment.
No, but Christians have used the concept of other, non-Christian gods having said to have been deified humans (because they had been euhemerized as such) to belittle all those other gods (and to trumpet their own god, Jesus Christ, as being different; born of a special woman, etc.).
Christians have used all manner of things, but Euhemerist explanations of the origin of gods were circulating long before the advent of their religion.
It is interesting that as Jesus becomes more exalted, the time of onset of his supposed condition of supernatural singularity is progressively retrojected by the Christian sources. To Paul, it occurs with his death and resurrection; to Mark with his baptism by John. Neither of these sources therefore need birth stories, and they are absent. The later Synoptics make him special from conception and birth, so they duly supply miraculous renditions of these events - different and irreconcilable ones. But other sources in these same Gospels provide us with genealogies, which contradict the birth stories and contradict each other.
gJohn makes Jesus very superhuman indeed, so he retrojects Jesus' supernaturality so far that he has him helping God out with the Creation. Thus John needs no birth story either. He not only omits any, but seems even explicitly to deny the Bethlehem accounts.
Now this progressive apotheosis looks like a really good candidate for Euhemerist interpretations. We see holier things being progressively added, and the period of Jesus' ordinary human life being progressively truncated, and finally completely eclipsed.
It is only too easy to understand, therefore, why Christian apologists would have attempted to show that rival divinities were appropriate subjects for the same treatment.