The was an only a minor threat from the Germans who were infiltrating our country because the there was no real unified effort, no cell phones or internet. Times have changed and the Muslims have been preparing for this power grab from within the US for decades, probably half a century. China, with the help of the UN is aiding and abetting the effort. The threat is real and the resentment is maybe justified. It is how the resentment is expressed that could pose a problem.
So, they are Muslim americans until we start standing up to the situation.