“ALTHOUGH, 3rd grade Science shows us that melting Ice does NOT RAISE water level...”
No, they don’t claim ice cap melting will raise the sea level, they claim that glaciers on land will melt and the runoff will raise the ocean levels.
To quote another great American ...Forrest Gump’s Mama ...
“Stupid Is as Stupid Does!”
Dropping HANSEN in the Ocean from a mile or two up would cause the ocean levels to rise more than the Land based glaciers.