bigot

n. [common] A person who is religiously attached to a particular computer,
language, operating system, editor, or other tool (see religious issues ).
Usually found with a specifier; thus, Cray bigot , ITS bigot , APL bigot ,
VMS bigot , Berkeley bigot. Real bigots can be distinguished from mere
partisans or zealots by the fact that they refuse to learn alternatives even
when the march of time and/or technology is threatening to obsolete the
favored tool. It is truly said You can tell a bigot, but you can't tell him
much. Compare weenie , Amiga Persecution Complex.