Can somebody explain to me why exactly a person who honoured Nazi collaborateurs can serve the Flemish Parliament?

Filip Dewinter of Vlaams Belang has, quite publicly, honoured Nazi collaborateur and Flemish nationalist August Borms, bringing flowers to his grave on the yearly organised Borms Remembrance Day (Bormsherdenkingen), yearly organised by a group dedicated to honour him (Bormshuis).

For anyone unfamiliar, Borms collaborated in both world wars, and was executed for treason against Belgium.

Why is this not seen as a bigger issue? If I started honouring Degrelle I'd (rightfully) get lots of hate for it.