The obvious response is that Gaza is a very densely populated place, of course there's civilians near any given location, that's not a conspiracy by Hamas. But are there any other talking points I should hit?
(I'm not really a lib in rehab, but this seems like the comm for getting talking points straight)
For sure, but at that point you can just end the conversation. You can't reason a person out of a position they didn't reason themselves into. You have to either say nothing, or be content with being correct and moving on.