Neither that tweet, nor the paper it referred to, attempted to correlate the exact date at which each Democratic candidate condemned violence with their respective election results.
that is such an impossible ask. We can only look at these things in aggregate. Contrary to popular belief a whole country doesn't turn on a time. Also even if that is your standard, this finding is still relevant.
The tweet shor got fired for was literally giving data for this. Did you see the article about his firing?