Question this and you're worse than Hitler: "the extreme cold was mostly attributable to a natural climate cycle, the extreme warmth was not"

:: SCRIPPS OCEANOGRAPHY NEWS : : How Extremely Warm Were the Last Two Notoriously Cold Winters? ::

...the extreme cold was mostly attributable to a natural climate cycle, the extreme warmth was not.

"We investigated the relationships between prominent natural climate modes and extreme temperatures, both warm and cold. Natural climate variability explained the cold extremes, the observed warmth was consistent with a long-term warming trend," said Kristen Guirguis, a Scripps postdoctoral researcher who is the lead author of the paper set to be published in the journal Geophysical Research Letters.
...
"Over the last couple of years, natural variability seemed to produce the cold extremes while the warm extremes kept trending just as one would expect in a period of accelerating global warming," said Scripps climate researcher Alexander Gershunov, a report co-author.

Gershunov noted, however, that the study shows that extreme cold events in the past two winters, though driven by a natural cycle, are still consistent with global warming trends. The oscillation would have made cold snaps even more severe if the global warming patterns superimposed upon it hadn't mitigated the cold.