A Dutch politician leading a fact-finding mission to Bangladesh to investigate the genocide committed by the Pakistani Army during the Bangladesh Liberation War is a highly unlikely scenario given the limited jurisdiction of the Netherlands in international affairs. The Netherlands, while a member of the European Union, is not part of the United Nations Security Council. As such, it is not in a position to launch an independent fact-finding mission.
Furthermore, Bangladesh is on the other side of the globe, and the Dutch government would require a great deal of support from the international community in order to carry out such a mission. It would need to secure funding and personnel from various organizations, coordinate the logistics, and be able to guarantee the safety of the delegates. The Netherlands also lacks the necessary diplomatic clout and resources to be able to mount such a mission.
Therefore, a Dutch politician leading a fact-finding mission to Bangladesh to investigate the genocide committed by the Pakistani Army during the Bangladesh Liberation War is a highly unlikely scenario.