Guillermo Del Toro said this quote

THE THING WAS AN EXPERT IN HORROR, BUT THIS HUMAN HORROR INDEED EXCEEDED ANY OTHER POSSIBLE FATE. NOT ONLY BECAUSE IT WAS WITHOUT MERCY, BUT BECAUSE IT WAS ACTED UPON RATIONALLY AND WITHOUT COMPULSION. IT WAS A CHOICE. THE KILLING WAS UNRELATED TO THE LARGE WAR, AND IT SERVED NO OTHER PURPOSE THEN EVIL. MEN CHOSE TO DO THIS TO OTHER MEN AND INVENTED REASONS AND PLACES AND MYTHS IN ORDER TO SATISFY THEIR DESIRE IN A LOGICAL AND METHODICAL WAY.