The followers of the Inman will take him serious and strap on a suicide vest and go out and kill some innocent people (we have evidence of this occurring). I doubt if any follower of Robertson will do the same, but then you knew that.
Also, if you have not done so, read the statement in the context it was made.
Hate is hate. Preach it hard and often enough, who knows what seeds will be sown.
So when Clinton uses dozens of cruise missiles to try to "take out" the people involved in an assasination attempt against a former US president, he's hailed as a hero, but when some conservative religious figure that the leftists love to hate merely suggest that we might want to "take out" someone who's actively acting against the US and the safety of its citizens, he's roundly condemned. Go figure.