Because it is a known fact that the eastern antarctic ice sheet is growing larger and colder and that it has been for many years.
Reality disagrees with you.
Accelerated Antarctic ice loss from satellite gravity measurements
---
Accurate quantification of Antarctic ice-sheet mass balance and its contribution to global sea-level rise remains challenging, because in situ measurements over both space and time are sparse. Satellite remote-sensing data of ice elevations and ice motion show significant ice loss in the range of -31 to -196Gtyr-1 in West Antarctica in recent years, whereas East Antarctica seems to remain in balance or slightly gain mass, with estimated rates of mass change in the range of -4 to 22Gtyr-1.
---
That's the old data. Which said Eastern Antarctica had slightly gained ice mass, while Western Antarctica had lost vastly more ice mass. You claimed over and over that the total ice mass change was positive, which no study has ever shown. You just flat out made that up.
If you disagree that you just made it up, then show us your data which stated that total ice mass of Antarctica was growing. If you can't, it will be taken as your admission that you did indeed did just make it all up.
---
The Gravity Recovery and Climate Experiment (GRACE) offers the opportunity of quantifying polar ice-sheet mass balance from a different perspective. Here we use an extended record of GRACE data spanning the period April 2002 to January 2009 to quantify the rates of Antarctic ice loss. In agreement with an independent earlier assessment, we estimate a total loss of 190+/-77Gtyr-1, with 132+/-26Gtyr-1 coming from West Antarctica. However, in contrast with previous GRACE estimates, our data suggest that East Antarctica is losing mass, mostly in coastal regions, at a rate of -57+/-52Gtyr-1, apparently caused by increased ice loss since the year 2006.
---
That's the most recent data, which says both east and west Antarctica are losing vast amounts of ice. It will be amusing to see what excuses you come up with in order to explain why you get to ignore the data that shows you were totally wrong. After all, since you are a political cultist, you are going to disregard any data that disagrees with you.