Anelka's comedian mate popularised the gesture. He says it's an anti-zionist/anti-establishment gesture but unless you're trying to be controversial or offensive you don't adapt the Nazi salute which is obviously incredibly offensive to Jewish people in order to make a point about anti-zionism, when everyone knows that anti-semitism and anti-zionism are two issues that are closely related and often conflated. If you decide to adapt the Nazi salute to make a point about anti-zionism I'm certainly willing to believe that darker sentiments may lie beneath the surface, that perhaps a dislike of Jewish people may also be informing the choice of salute. I don't know enough either way to leap to a conclusion, but it's certainly a possibility.
It comes down to whether you'll jut take someone at their word, or whether you think there's a possibility that they're using something more respectable to cloak more offensive and discriminatory sentiments. I could just take it at face value when people like the EDL say that they are only against radical Islam and not Islam in general or Muslims, or I can retain a healthy skepticism and entertain the notion that the word radical is added in front to add an air of respectability and attract the support of people who would object to the idea that Islam itself and Muslims are something we should stridently oppose.
That is the point. I'm not making assumptions either way because I don't know enough about it. My suggestion is that if you profess to know nothing about a topic, maybe you shouldn't be too eager to say someone has done nothing wrong, or that their intentions were pure.
Personally I wouldn't dream of basically suggesting that a member of a racial/ethnic/or religious group was probably wrong to be offended by something when I admit myself that I know fuck all about it. I'd educate myself first before I tried to go down that route.
"I don't now of many black nazis" is just totally nonsensical reasoning. No one is saying he is literally a member of the NSDAP, but being black doesn't preclude him from being expressing or holding anti-semitic views. Where I grew up there was a lot of casual anti-semitism thrown around, and yeah, some of it was by black people.
Anyway I've got stuff to be getting on with today. I'm organising a march against zionism, I've got to order everyone's brown shirts and arm bands if I want them to arrive in time. I sure hope that it isn't misconstrued as anti-semitic march though.