dev- / Devil

[Rajarshi Banerjee]

>"Devil" is not related to dev-. Devil is ultimately a derivative of Ancient
Greek diábolos, >an agent noun of diabállein (different ablaut) "to throw
around, mislead, confuse". 
(diá "through/around", bállein "to >throw", related to English/German
ball/Ball). 
both roots have the same meaning?
Is  there a connection between  dev-devatA and diety. 
With the advent of christianity was there any demonization of pagan greek
gods?