Obama is not an American President. He is an American ex-president. I would see this the same as how one might speak about one’s present wife versus how one may speak about one’s adulterous ex-wife. While they are the President, honour them. Once they have been dismissed, you may deal with them as any other ordinary citizen.
It seems that the people whining about Trump disrespecting ex-president Obama have no qualms about saying the most slanderous and disrespectful things about their present President.
Sure. If his predecessor is trailing along behind him like Wormtongue in LOTR, trying to undermine what Trump has been working on with other world leaders and stabbing his President in the back, sure Trump’s entitled to hit back at the traitor.
No. Obama didn’t do anything that demeaned the office of President either. Obama did things that demeaned himself, as does every national or corporate leader. They are all human. Anyone who expects to have a perfect leader will have to wait for Jesus to return.