Being badly treated and being discriminated against look and feel the same.  
What separates the two is the thinking process that "who needs him, he's
(characteristic x)" (you pick the stereotype).  What also separates them is
that the first is not illegal and the second its.

A case of discrimination rises or falls with the say-so of innocent bystanders
in the group.  If any colleagues have overheard and will report a supervisor's
(i) unusual attitudes about x characteristic or (ii) badmouthing workers with
x characteristic in general or (iii) stereotypes about x characteristic, then I
believe the case has some value.

The way to test this is to contact those you feel are allies, ask them if they
heard (i), (ii) and/or (iii) above, and if so, ask them to write you a brief
confirming note. The note need not be lengthy.  It need not take a moral
stand, a stand against the company, or any stand whatever. The letter is
intended to be merely factual.  Please contact us for a sample note.
M. A. JACOBSON, P.S., INC.
EMPLOYMENT & IMMIGRATION LAW
Proving Discrmination
Mike Jacobson
119 First Avenue S
Suite 200
Seattle, WA 98104

Tel: 206-447-1560
Fax: 206-447-1523