Starbucks (apparently a well-known brand of coffee shop for those of us who prefer to make their own coffee rather than pay over the odds for a infusion of caffeine) have introduced a plain red cup for the holiday season, christmas, Xmas, Mythmas, or the Winter Solstice (depending on what you want to call it). In previous years, Starbucks had decorated cups for the holiday season – decorated with snowflakes, etc. In other words generic seasonal symbols.
This year they have gone for a plain cup to encourage their customers to doodle.
For some reason the religious nutjobs (given their behaviour you can't really call them anything else) have taken umbrage at this – claiming that Starbucks are trying to take the Christ out of Christmas. Which demonstrates the emotional maturity of a toddler crying because she can't catch her shadow, as the Starbucks' seasonal cups have never included overtly religious symbols.
There is even one of the less rational Republican candidates for president (which equates to a gibbering megalomaniac) who thinks that we ought to boycott Starbucks over the issue.
When you come down to it, Starbucks has given these religious fruitcakes the opportunity to put Christ into the holiday season by giving them an empty space on their Starbucks cups to doodle their designs.