Personally I'd argue that people building a campaign around the idea that one's neighbours are sending out vicious "rapists" and the solution is to build a wall and force the neighbours to pay for it is rather closer to primitive tribal psychology than arguments for boycotting individuals actively endorsing and funding the dissemination of said hate. YMMV.

Regardless of whether one thinks boycotts are a reasonable way for people to express their view or unhelpful political pressure on other people's views, comparing them with mass murders conducted by revolutionaries is just unhinged.