Let me quote the key politicians. The Dutch sources are AD Tijdsdocument (2002) and Volkskrant (2002) and I give my own translation.
Paul Rosenmöller (leader of the green left, GL) calls him “not just right-wing, but extreme right-wing” (which implies fascism). [ [133]
Thom de Graaf (leader of the liberal democrats, D66) refers to Anne Frank’s “Achterhuis”.
Ad Melkert (leader of the social democrats PvdA): “He crosses a line that you are not allowed to cross. Holland, wake up !” Later he adds: “You wake up, and you see Le Pen. You wake up, and you see Fortuyn.” [ [134]
Gerrit Zalm (leader for the conservative liberals VVD) : “a dangerous man”. [ [135]
VVD chairman Eenhoorn: “the Mussolini type of leader”. [136]
Marcel van Dam (influential columnist, both on national TV and in a widely read newspaper, also PvdA): “lower than a low-life”. [137]
Wim Kok (prime minister at that time, PvdA): “sowing of hate and discord”. [138]
Evaluating the situation and these statements, the Dutch political scientist Cas Mudde concludes, see AD Tijdsdocument (2002:82):
“(…) can be documented that Fortuyn was demonised by politicians like Melkert, Rosenmöller and Zalm.” [139]