Germany’s domestic intelligence agency names “relevant actors” in the “secular pro-Palestinian extremism” world, including the Popular Front for the Liberation of Palestine (PFLP) and the Boycott, Divestment and Sanctions (BDS) movement.

...

It then goes on to a section on “symbols and identifying marks”, which includes the slogan “from the river to the sea, Palestine will be free” and the “symbolism of a cut watermelon”.

“The watermelon, alluding to the colours of the Palestinian flag, is a symbol of solidarity with Palestine. Here, the outline of the entire state of Israel is depicted in the colours of the Palestinian flag (as a sliced watermelon), thereby denying Israel's right to exist,” the BfV says.

hmmm....

German Haribo candy 'Wasser Melonen'

I'm not sure this one checks out 100%...