A lot of Islamophobic people use the Jewish people as a cipher for their rampant racism.
I think this is a fair and likely accurate point. Things do change, but the old extremes of certain hooligans like Chelsea etc had signficant links with C18 and that, so I imagine these FLA marches are a bit more confusing for the older heads.
There's a lot of sideways talking though. Zionist is certainly a synonym for some and there's been holocaust trivialising on this thread alone which ought to make folks uncomfortable.
This issue is often the wink-wink vehicle.