What is the biblical basis for the belief that destroying a grave or body is an act of desecration? I was reading an old article published in Christian Today on July 17, 2014, in which Brownie Marie reported that ISIS desecrated the tomb of Jonah, and were burning churches. The only thing I could find in the Bible related to desecrating a tomb or a body is Amos 2:1, which reads:


  Thus says the Lord:
  &nbsp;&nbsp;&nbsp; "For three transgressions of Moab, and for four,
  &nbsp;&nbsp;&nbsp; I will not turn away its punishment,
  &nbsp;&nbsp;&nbsp; Because he burned the bones of the King of Edom to lime.  [NKJV]


Is this the only example, Amos 2:1? What additional biblical basis is there for not desecrating a grave or a body?
No, this is not the only example.  The prophecy of 1 Kings 13 must also be taken into account, and especially its fulfillment.


  2 Kings 23:20 is its fulfillment: "And he slew all the priests of the
  high places that were there upon the altars, and burned men's bones
  upon them, and returned to Jerusalem."


It's also paralleled in 2 Chronicles 34:5

The reason why I am citing this as an example is because this was pronounced as a judgement much like Amos 2:1 which was referenced.  So then if these false prophets were the recipients of an unusual pronouncement from a prophet of G-d, and they were singled out for punishment then the opposite is proven as the rule.

Should that not be enough, commandments such as  


  Deuteronomy 21:22,23 "If a man has committed a sin worthy of death and
  he is put to death, and you hang him on a tree, 23 his corpse shall
  not hang all night on the tree, but you shall surely bury him on the
  same day (for he who is hanged is accursed of God), so that you do not
  defile your land which the LORD your God gives you as an inheritance."


Despite the focus being on avoiding the polluting of the land it is clear that the action is barred for additional reasons, such as keeping the "humanity" of the corpse in mind and that some kind of burial is necessitated.   


  Joshua 7:26 "And they raised over him a great heap of stones unto this
  day. So the Lord turned from the fierceness of his anger. Wherefore
  the name of that place was called, The valley of Achor, unto this
  day."


And  


  Joshua 8:29 "And the king of Ai he hanged on a tree until eventide:
  and as soon as the sun was down, Joshua commanded that they should
  take his carcase down from the tree, and cast it at the entering of
  the gate of the city, and raise thereon a great heap of stones, that
  remaineth unto this day."