In the same year , the parliamentary party supported the invasion of Afghanistan after the terrorist attacks of September 11 . This invasion led to great upheaval within the party . Several former PSP members within the House of Representatives parliamentary party began to openly speak out their doubts about the intervention . Under pressure of internal opposition , led by former PSP members and the party 's youth organisation DWARS , the parliamentary party changed its position : the attacks should be cancelled
terrorist attacks of September 11
September 11 attacks
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