Vlaams Belang has voters who are neo-Nazi.
All right wing parties get voters from people who oppose the current immigration-invasion.
Some people inside the party have anti-semitcal backgrounds.
The party itself is actually the most pro-Israel in Belgium.
I think Vlaams Belang is the only party that openly condemns anti-Jewish attacks from muslims.
Other parties minimise the danger from muslims to Jews.
They of course blame Israel for this, stating that : "not all Jews are Israeli",
and are openly anti-Israel , and in the same time anti-Nazi.
Thus they blame Israel from being "Apartheid", and "Nazi".
But indeed , in Flanders , some groups oppose Zionism, stating it is a force that wants to dominate the whole world.
Those groups however hate all foreigners as well. But they do not care about Islam , as long it stays out of Europe.