I don’t really see what’s scary about that. NASA uses a standardised colour coding system to indicate warming or cooling, the greater the degree of cooling the deeper the blue that is used, similarly the greater the degree of warming the deeper the red. In other words, the colour bar uses the same colours even though the maximum and minimum values differ between graphics.
On the graphic you linked to the deep red indicates 1°C of warming whereas if we look at a graphic showing global temperatures last month then the same deep red is used for warming in excess of 4°C:
http://data.giss.nasa.gov/cgi-bin/gistemp/nmaps.cgi?year_last=2013&month_last=12&sat=4&sst=3&type=anoms&mean_gen=12&year1=2013&year2=2013&base1=1951&base2=1980&radius=1200&pol=rob
Blue is recognised globally as the colour depicting cold, red depicts warm. It would be a bit silly if NASA used anything else.
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EDIT: RE YOUR ADDED DETAILS
“Why don't they compare it with same color coding on a daily scale which shows the world's 30, 40, and even 50 degree changes”. NASA use the same colour coding for all the graphics regardless of time-scale, if they produced daily images they’d have the same colours on them.
“The article reads "... horrifying ..."!” Your question isn’t about the article. The “horrifying” part was first added when the graphic was reproduced on Jonathan Geller’s Boy Genius Reports website, this is where Yahoo got their news story from, they kept the title. It’s another example of why media sites and personal blogs are unreliable.