Donald's full on bigot/racist has really changed the usual Republican strategy. The GOP has been appealing indirectly to racists and bigots since Nixon first developed his "Southern Strategy" using "State Rights" as code words for anti-civil rights.
Since then the Republicans and conservatives have become masters in the use of racist and bigoted dog whistles. Every bigot and racist knows full well who supports their positions. The whistle will even appeal to and encourage intolerance and fear and oppression of those that are different then their white Christian selves.
Victims of GOP/Conservative hate mongering for political gain include
African Americans Hispanics LGBT community Muslims Atheist
and so on
It wasn't hard to see that the GOP was going to try and exploit the latest terrorist attack for political gain by stirring up hatred and fear of Muslims while pretending they weren't.
Only problem is that their leading Presidential candidate lacks the subtlety to play the dog whistle game. So now the GOP is forced to denounce the very position they intended to exploit and encourage.
Great turn of events for our nation