I always thought it was weird when people got mad when Christmas stuff came out "too early"
(If you celebrate) - Christmas is one of the best times of the year - why not make it last as long as possible?
It's like saying....you're eating that slice of pie TOO EARLY - or you are giving me that raise TOO EARLY.
Although there could be a number of symptomatic reasons why someone would want to obsessively put up decorations early, most commonly for nostalgic reasons either to relive the magic or to compensate for past neglect.
In a world full of stress and anxiety people like to associate to things that make them happy and Christmas decorations evoke those strong feelings of the childhood.
Decorations are simply an anchor or pathway to those old childhood magical emotions of excitement. So putting up those Christmas decorations early extend the excitement!