Winter Solstice - A celebration of attacking everybody else?

Here's the background story: Some religious groups have been putting up their holiday displays and an atheist group wanted to add their own Winter Solstice display. The sign was displayed, but stolen, found in a ditch, returned to a radio station, and put back on display.

As you can see, the sign is not celebrating anything. The group is taking this opportunity to insult and protest everybody else who disagrees with them. But the aethists can't even see the hatred in front of their own noses. Their leader was quoted as saying, "The atheist message was never intended to attack anyone."