No, really cold weather or major snow storms DO NOT disprove Global Warming.
There is a difference between CLIMATE and WEATHER.
Not only that, Global Warming is expected to produce greater extremes. That means the possibility of unusually frigid weather at times in the winter or larger, more brutal blizzards.
Conservatives who deny Climate Science are just like the Conservatives that deny Evolution. They don't make any effort to understand the science and base their opinions on how they want things to be rather than how they really are.
Is it possible the Climatologists are wrong and this is just a passing phase? Yes it is but it's looking less and less likely that's the case.