OK, then what is the issue with melting ice caps?
Probably a question of size as opposed to mass. Not to mention the CO2 and other ingredients are confounding factors.
But again pragmatically speaking all one has to do is point to the dozens of failed predictions to vitiate the fundamental premise of the Climatistas. Last I checked the Maldives is fine.
It's pretty simple.
When polar ice melts, the sea levels rise. It has been this way for time immortal. The water we have is all there is. No more is being made. When enough of it freezes, sea levels noticeably drop. In a long term thaw, sea levels rise. This is a normal cycle. I have no firm position on what causes it other than the sun does what it wants and the axis of the Earth occasionally shifts.
In a warming period, ocean temperatures also rise, so you have more storms and they tend to be more severe because warm water is like fuel to atmospheric events such as hurricanes. Warming water also causes changes to the marine ecosystem. Coral dies and there are species that can't adapt and die off. Also a normal cycle. Salinity can also change, which can also dramatically affect marine life.
Gore, Kerry, and idiots who worship them and their cause are very clever in speaking half truths. Weather and climate is constantly changing. It is true temperatures have been rising. It's true polar ice has been melting. Then some of the ice comes back. Then it goes away again. Stupid people look at short term intervals of a month or a year or even their lifetime - which is a nit when to come to shifts in climate. It can take thousands of years. Even millions. These trends are never linear.
Current events: There's a freak snow storm in Florida and morons are saying... Look! See? There's no warming! Debate them on their narrow and uninformed viewpoint and it's like talking to a retard.
In another warm time, the entire middle of North America was an inland sea. From today's gulf to British Columbia. Because it was warmer and there was less ice then. We weren't around, so what caused that? Is too much CO2 and burning fossil fuels causing the warming? Nobody, including climatologists with the training and education to understand why things happen really knows for sure.