Suppose some Republicans decide to make an issue of Obama's missing lapel pin and his omission to put his hand on his heart. Following Swiftboat SOP, they would be independent of John McCain. (We may have cardcarrying Swiftboat Republicans at BOTF.)
Add the fact that two thirds of American voters believe the invasion and occupation of Iraq was a mistake.
Really, that general belief divides from "the invasion and occupation of Iraq was (merely) a matter of mistaken intelligence" to "the invasion and occupation of Iraq was based on unspeakably false pretenses", (and, as Sarvis asked earlier about that, cui bono?). In any case, two thirds of us have more or less had it up to here with Iraq and George Bush's blue smoke and flag-waving bullshit.
Suppose Obama doesn't put his hand over his heart because he means to lead by example in opposition to the contined political manipulation of American sensibilities by neocon / fascists.
How could Obama be so bold, you ask? Only if he thought most of our angry two thirds and some of the other third were wise to this bullshit false flag patriotism and increasingly angry when they see it used for mass intimidation. If that's what's happening, and if that's what Obama has in mind, I'm with him all the way.
Furthermore, if that's not what Obama has in mind, it makes a good story anyway. Even if he (honestly) denies it at some point...gives a different reason or makes no comment, some people will be attracted to my explanation because it's plausible and satisfying.
You said, maybe being arrogant and turning off lots of voters is a winning strategy.
I'd spin it this way: standing fast in opposition to the fascist swine who use patriotism as a weapon of mass intimidation could be a winning strategy, too.
Disclosure: I'm not affiliated with the Obama Campaign in any way, just as the Swiftboaters weren't affiliated with Bush in 2004 when they went after Kerry.
During the Republican presidential primary in 2000, other "independent" Bush supporters ferociously attacked John McCain (another Vietnam veteran in the U.S. Senate), questioning McCain's commitment to veterans. Yet another front group, calling itself "Republicans for a Clean Environment," spent $2.5 million (covertly provided by Dallas billionaires Sam and Charles Wyly, investment bankers and friends of Bush) to run TV ads in California, Ohio and New York attacking McCain's environmental politicies. Bush distanced himself personally from the attacks on McCain while letting the "independents" do his dirty work for him - the same stance he has taken recently with respect to the Swift Boat attacks on Kerry.
After personally trashing John McCain, his wife, and their children in the 2000 South Carolina primary, George W(orst president ever) Bush told McCain, "It's just politics, John."
McCain reportedly replied, "Not everything is politics, George."