Nobody even seems to care about that angle: Stop and frisk is unconstitutional. If you declare martial law, then have at it - but don’t just do it as business as usual.
The ends only justified the means to many people because THEY weren’t the target.
“Stop and frisk is unconstitutional.”
Unfortunately while my own knowledge of the constitution is not great I do have a copy and I do look up things so I estimate that my own limited knowledge exceeds that of ninety percent or more of Americans, many of whom can “quote” things that appear nowhere in the document. I believe your comment on stop and frisk is correct but I would say that well over fifty percent of the population believes that whatever they personally favor is constitutional and whatever they disapprove is forbidden by the constitution.