True.
I do not know who "the rest of us" are, but we have absolutely no reason to conclude that only those persons in those few photos bear the responsibility for the debacle. Other news articles show persons parading around various Starbucks locations and demonstrating with signs and holstered handguns.
That is not a good way to win friends and influence people positively. In our area, the demonstrators walked around with holstered pistols, announced that they were doing so to "exercise" their Second Amendment rights, and caused open carry to be prohibited in several municipalities.
That result should have been readily foreseeable to anyone with any sense--as was the fiasco with Starbucks.