The Gaza Ministry of Health systematically undercounts the dead. First, they only attemp to count direct casualties, which excludes preventable deaths from malnutrition, disease, loss of shelter, etc. Second, their capacity to find the dead is significantly reduced due to the war. This isn’t unique to this situation. For almost any disaster, casualty estimates continue to go up after the disaster itself is over, and there are resources to spend looking for dead bodies.

No they aren’t. Marrying a US citizen makes it easier to get a green card, but you still need to apply and go through the process. Even then, there is no legal guarantee that your application will be granted.