The city’s public hospital system is warning staff not to help people avoid being found by Immigration and Custom Enforcement, as liberal pols demand the mayor rescind the guidance in their fight to keep locations safe from homeland security.

An anti-Israel protester got a slap on the wrist for allegedly barging onto a packed Manhattan subway train last summer and demanding “Zionists” identify themselves — a legal outcome that left Jewish advocacy groups outraged. Anas Saleh, 24, will have his disorderly conduct charge tossed if he completes four hours of community service at a...