For in depth article on “Why do Jews forbid Cremation go to: Chapad.org, look up the article death and morning. Here is a overview of the article:To sum up:
Cremation
· is a transgression of a Biblical law to bury our dead,
· demonstrates a rejection of G‑d’s supreme “ownership” over all of Creation,
· violates our legal responsibility to return what was loaned to us (our bodies) in as wholesome a state as possible,
· constitutes a rejection of the Jewish belief of tzelem Elokim (created in G‑d’s image),
· constitutes a rejection of the Jewish belief in resurrection of the dead,
· (if done voluntarily, knowing fully the responsibilities) will cause the body not to be included among the Jewish People when the time of resurrection arrives,
· violates the biblical prohibition of following heathen practices,
· upends the soul’s natural separation and acclimation process, thus causing it additional untold pain,
· deviates from Jewish history and our forebears’ and contemporaries’ selfless and heroic efforts to properly bury our dead, and
· declares, in effect, that once the soul has departed the body, the lifeless body has no further value.