Fubar, not ALL Americans will do that, some will. Most will keep their thoughts to themselves,and may put some distance between a person they deem to be Muslim and themselves. Instinctive human behaviour.
Many will make it a point to be inviting to those they deem Muslim, to show they are is not biased.
And all these things happening are NOT because of what these two are said to have done, this is just reinforcement of all that has happened before and is happening in many places on a daily basis.