TEL AVIV, Israel — When nearly 1,000 Israeli Air Force veterans signed an open letter last week calling for an end to the war in Gaza, the military responded immediately, saying it would dismiss any active reservist who signed the document. But in the days since, thousands of retired and reservist soldiers across the military have signed similar letters of support. The growing campaign, which accuses the government of perpetuating the war for political reasons and failing to bring home the