GAZA CITY, Gaza Strip ? Thousands of unpaid teachers went on strike Saturday, shutting down schools across the Palestinian territories on the first day of school – a backlash that is testing the beleaguered Hamas-led government’s ability to survive.

The government, crippled by international sanctions, has so far enjoyed public support as it weathers the six-month-old crisis. But that may change if people conclude that Hamas’ anti-Israel ideology is jeopardizing their children’s education – and hopes for a better future.

Hamas, which took office in March after winning legislative elections, has rejected international calls to renounce violence and recognize Israel’s right to exist, despite sanctions by Israel and Western donors that have bankrupted the government.

Unable to pay the government’s 165,000 workers, Hamas has sought help from Muslim and Arab allies, literally carrying money into the Gaza Strip in suitcases. But it has raised only a tiny fraction of the money needed to pay back wages.