The two points being "debated" here are not inconsistent. Over the past 30 years, the globe has warmed, although this has stalled for the past several years. See.
http://www.drroyspencer.com/latest-global-temperatures/
Within the global context, its not surprising that some regions would be colder and some warmer. The data set presented, if reliable, seems to show whistler has cooled moderately over the 30+ year time frame.