sad to see that this potential big discussion is reduced on the form of a logo/symbol. i absolutely cant stand the tea party and im still convinced that their acting cost mitt the election, but they are right with some things that there are parallels between what hitler did and what obama is doing. some could argue that there have been good aspects in dictatorships, health and education for example, also in eastern germany, but how could you say if it comes in a "nice" form. and if you oppose anything obama does you are a racist immediately.
to make it short: i always prefered individual choice and freedom over some - some dubious - organisations for the mass.
The "Hitlerian comparison" is resisted because of the BAD that happened under his rule. Never mind the good (including a well-designed national highway system - the Autobahnen - that was such a marvel that no less than Dwight David Eisenhower pilfered the idea and moved it lock, stock, and barrel to the United States); the BAD outweighed the good to such a degree that such comparisons are despised even by other dictatorships and autocracies. (Examples - Cuba, the PRC, Syria, etc.)
However, one modern dictator WELCOMED the comparisons to Hitler - fortunately, he is no longer among the living. That dictator is Saddam Hussein.
Would you rather that Barack Obama be compared to Neville Chamberlain or Albus Percival Wulfric Brian Dumbledore?