In the very simplest form, because there's a large class of people for whom "We're being attacked by Soros" translates directly to "We're being attacked by a ma

In the very simplest form, because there's a large class of people for whom "We're being attacked by Soros" translates directly to "We're being attacked by a massive globalist (read: Jewish) cabal", and Facebook appears to have exploited this. It's a clear dogwhistle in my opinion.