This resource combines information from a variety of sources (check the Sources tab). It’s intent is to be comprehensive, yet user friendly. It’s not perfect but its the best I can do and IMO is better than the alternatives.
Each listing shows the reason for inclusion (donating to Trump, assisting ICE, advertised on Fox News, etc).
Check https://www.chicodemocracy.com/boycotts.html for additional boycott resources and alternatives.
I haven’t researched it much myself as I have a few very nice small hardware and lumber shops by me. However, Harbor Freight is not on this list.