Piers Morgan calls a pro-gun advocate stupid on live television and becomes the darling of the liberals in the US. Wherever you stands on gun control, this is the kind of thing that should worry you. Name calling is increasingly taking the place of debate in Western society. If someone doesn't agree with you, the only possible reason is that they must be an idiot. No need to make an actual argument - it's not like they could understand.
Lack of courtesy is a bad road to travel. Jesus had something to say about name calling. In Matthew 5 he said if you called someone 'Racca' (idiot) it was equivalent to murder. Mr Morgan is on record as saying he is a Christian, so perhaps this is something for him to bear in mind next time he is tempted to replace rational argument with insults.