If you believe that Russian interference had a material effect on the amount of support for BLM[0], then presumably you would agree that Russian interference was also enough to change the 2016 election results by 80,000 votes.[1]

[0] https://www.nytimes.com/interactive/2020/07/03/us/george-flo...

[1] https://www.axios.com/hillary-clinton-2016-election-votes-su...