The question is not whether there was a coup or not, but "When is it appropriate/acceptable to stage a coup?"
If the elected government leaders are not abiding by the laws of the land by using inappropriate authority to override the constitution, then those who swore to uphold the constitution have a legal and moral responsibility to fulfill their oaths to defend and protect the constitution!
This is what the discussion must address then!
1) Did the government, represented by Morsi, exceed its constitutional powers?
2) If so, who has the power to challenge him?
3) Those with the power then, must be able to justify their actions from a legal stand point!
Coups are never considered legal because, by definition, they are outside the bounds of accepted law, but when the government does not follow the laws they are elected to protect, defend and enforce, do they not then lose their own moral standing to complain when they are forcefully removed from office?