It starts from the top down. Carter, Gore and Clinton have openly mocked George Bush. Gore I understand, he was never the President, but both Carter and Clinton broke the tradition of former Presidents not commenting on the current President's term. Then you have obama insulting the supreme court in front of the entire nation...
http://www.msnbc.msn.com/id/18759682/ns/politics/t/carter-says-comments-were-careless/#.T9y4cu0tWFI
http://abcnews.go.com/blogs/politic...sed-if-supreme-court-doesnt-attend-next-year/
And then obama personally invites Rep. Paul Ryan to his budget speech...and insults him before congress and the nation...
http://newsbusters.org/blogs/lachla...ails-tough-obama-insulting-paul-ryan-his-face
The guys above are not conservative partisans but left leaning pundits.
Add to that the sending back of the bust of Winston Churchhill, a hero of one of our closest allies for personal reasons.
And on top of that is obama's annoying habit of accepting being called "Mr. President," and then proceeding to not use the titles of the other people in the room, calling the senators and representatives by their first names. He also does this to foreign leaders, for example, referring to the Chancellor of Germany not as Chancellor Merkel, but as Angela, in front of the press during their joint press conference.
The reason he gets this show of disrespect is because he goes out of his way to earn it. As the saying goes, you have to give respect to get it. He doesn't show respect to other people, as a President of a free people should, and so people have started to pick up on that and have reacted accordingly. He disrespects the office and gets disrespect back. We aren't his subjects, he is our employee. The lack of respect started with Carter and has continued through the democratic party to this day. Ted Kennedy is a great example as he went to the soviets to help them counter Reagan. This disrespect of the head on a pike is just one in a long list of disrespect shown to republicans by democrats.