So you don't think it's strange that Obama's team let Donald Trump spend months stirring up xenophobic hate against America's first black president? Amongst his most extreme detractors? Okay then.
It's not strange, it's political genius. Allowing nutters to dominate the news and become ever more angry and ridiculous, even while there are much much more important things happening (healthcare, the economy, even the name of the Obama family's dog), and then pulling the rug from underneath them, makes it seem like republicans are both obsessed with a non issue and racist morons.