For anyone else wondering “why did the US veto it?” rather than jumping to an emotional reaction, the article explains the US’s position:

U.S. deputy ambassador Robert Wood called the resolution “imbalanced” and criticized the council after the vote for its failure to condemn Hamas’ Oct. 7 attack on Israel in which the militants killed about 1,200 people, mostly civilians, or to acknowledge Israel’s right to defend itself. He declared that halting military action would allow Hamas to continue to rule Gaza and “only plant the seeds for the next war.”

“Hamas has no desire to see a durable peace, to see a two-state solution,” Wood said before the vote. “For that reason, while the United States strongly supports a durable peace, in which both Israelis and Palestinians can live in peace and security, we do not support calls for an immediate cease-fire.”