Why did the US block a resolution demanding an end to Israel’s war on Gaza?

The United States has once again blocked a United Nations Security Council resolution calling for a ceasefire in Gaza, marking the fifth time it has used its veto power since Israel's conflict began nearly a year ago. Despite international efforts to de-escalate tensions and achieve stability, both Israel and Hamas have continued their hostilities, raising concerns about whether permanent Security Council vetoes undermine the body's ability to enforce resolutions effectively.