Most of the glaciers in Antarctica were shrinking 100 years ago, during NASA’s coldest years ever. At the time, climate experts didn’t lie about it though. They explained that the shrinking glaciers were due to the cold.
Strange to say, meteorologists argue that the diminution of ice indicates that the climate was formerly milder than now. Ice and snow only accumulate where there is occasional warmth with moisture and variations of temperature. A continuous dry cold does not favour the accumulation of ice and snow.
Note that according to NASA, this was occurring during the coldest years on record.