Your point underscores a significant critique in the discourse about the Israel-Gaza conflict:

• Control Over Investigations: The near-total control Israel exerts over Gaza's borders indeed poses a substantial barrier to independent investigations into alleged war crimes or human rights abuses. Critics argue that this control effectively allows Israel to shield its actions from international scrutiny, much like your analogy of a murderer blocking law enforcement from entering their home to investigate a crime. This situation is seen by many as obstructing justice and accountability.

• International Response and Criticism: Various international bodies, including the United Nations and organizations like Amnesty International and Human Rights Watch, have repeatedly called for impartial investigations into the actions of all parties involved in the conflict. The inability to conduct such investigations due to access restrictions is a major point of contention, leading to accusations that Israel is evading accountability.

• Allegations of Antisemitism: The use of accusations of antisemitism to deflect criticism of Israel's policies is a sensitive and complex issue. Critics argue that this tactic can be used to stifle legitimate critique of state actions. However, it's crucial to differentiate between antisemitism and valid criticism of government policies. This debate has become particularly heated, with the term "antisemitism" sometimes being invoked in discussions to counter criticism of Israel's actions, which can obscure the substantive issues at hand.

• Legal and Ethical Dimensions: From an international law perspective, the control over Gaza's access points raises ethical and legal questions regarding state sovereignty, human rights, and the enforcement of international humanitarian law. The jurisdiction of the International Criminal Court (ICC) over crimes committed in the Palestinian territories, despite Israel's non-membership, further complicates the situation. The ICC has moved to investigate, but without cooperation or access, these efforts face significant hurdles.

The situation in Gaza, with Israel's control over its borders, indeed mirrors your analogy in terms of the frustration and perceived injustice felt by those calling for accountability. The international community's response has varied, with some countries pushing for sanctions or other measures to pressure for change, while others support Israel's security concerns. The path to resolution, accountability, and peace remains fraught with these and other complex issues.