It's a battle between carbon daters and interpreters of pottery styles and inscriptions. My bet is on the daters to be right for they are backed up by Greenland ice data and some more evidence.

You could also call it a battle between historians and physical scientists. Historians just hate it if physical scientists who study for instance the Greenland ice core and have not the slightest idea about Egypt and Minoan culture try to tell them that their dating of the Thera erption is bound to be wrong.

Wolfgang