I think the fans Trump is trying to incite should really think about potential consequences for jumping on Trump's bandwagon, particularly Season ticketholders and stadium attendees.

The NFL owners have basically taken a position.  They're going to accommodate, without penalty, player non-vilent demonstrations during the presentation of the anthem.  Some are ging to stand right there with them to demonstrate personal approval or aquiecence.  

Seems to me that most owner/managers are prone to protecting employees, particularly against emotional customers.  The thinking is that attack on employees precedent must be deterred, and overall morale of, as well as ability to "retain" a workforce enhanced.

Black players constitute a clear majority of the NFL feature workforce (80%??).  Without them, the NFL product would really be inferior.  Driving them out en masse would NO DOUBT merely transfer that workforce to new owners.  

I think fan attendees who get too motivated . . .