Burdine, 450 U.S. 248, 252-53, 101 S.Ct. 1089, 1093, 67 L.Ed.2d 207 (1981), and McDonnell Douglas Corp. v. Green, 411 U.S. 792, 802-04, 93 S.Ct. 1817, 1824-25, 36 L.Ed.2d 668 (1973). See, e.g., Payne v. McLemore’s Wholesale & Retail Stores, 654 F.2d 1130, 1136 (5th Cir.1981), cert. denied, 455 U.S. 1000, 102 S.Ct. 1630, 71 L.Ed.2d 866 (1982).
First, the plaintiff has the burden of proving a prima facie case of discrimination based on opposition to an unlawful employment practice. See Burdine, 450 U.S. at 252-53, 101 S.Ct. at 1093. The plaintiff meets this burden if he shows that (1) he has engaged in statutorily protected expression; (2) he has suffered an adverse employment action; and (3) there is a causal link between the protected expression and the adverse action.1 Payne, 654 F.2d at 1136.
Second, if the plaintiff succeeds in proving the prima facie ease, the burden shifts to the defendant “to articulate some legitimate, nondiscriminatory reason” for the adverse employment action. Burdine, 450 U.S. at 253, 101 S.Ct. at 1093 (citing McDonnell Douglas, 411 U.S. at 802, 93 S.Ct. at 1824). The language of section 704(a) does not indicate what might constitute a legitimate and nondiscriminatory reason for disciplining an employee for engaging in statutorily protected expression. Courts, however, have held that certain forms of “opposition” conduct, including illegal acts or unreasonably hostile or aggressive conduct, may provide a legitimate, independent and nondiscriminatory basis for sanctions. Payne, 654 F.2d at 1142; see McDonnell Douglas, 411 U.S. at 803, 93 S.Ct. at 1824 (illegal conduct); Hochstadt v. Worcester Foundation for Experimental Biology, 545 F.2d 222, 233-34 (1st Cir.1976) (hostile, disruptive conduct). See also Silver v. KCA, Inc., 586 F.2d 138, 141 (9th Cir.1978).
Finally, if the defendant carries its burden of articulating a proper reason for taking disciplinary action against the plaintiff, the plaintiff has an opportunity to prove by a preponderance of the evidence that the stated reason was not the defendant’s true reason for acting, but a pretext for discrimination. Burdine, 450 U.S. at 253,101 S.Ct. at 1093 (citing McDonnell Douglas, 411 U.S. at 804, 93 S.Ct. at 1825).
1. Prima Facie Case.
Turning first to the question whether the appellants successfully established a prima facie case that Zellerbach violated section 704(a)’s opposition clause, we find that two of the three necessary elements are admitted by Zellerbach. The four-month disciplinary suspensions that continued in effect following the arbitrator’s decision constituted “adverse employment actions” against each appellant. The requisite causal link is also present, since Zellerbach admits the letter caused the firings. The only remaining question is whether the letter was statutorily protected expression.
We find this issue to present the most troublesome aspect of the case. The letter does not fit the classic mold of protected “opposition to an unlawful employment practice” for several reasons. First, the letter did not protest any specific instance or instances of unlawful discrimination, but rather stated only that “racism” and “discrimination” were prevalent at the Zeller-bach Paper Company. Second, the letter was primarily worded as a protest against the presentation of the Early Bird award to Burl McColm, a Zellerbach employee, and only secondarily as an objection to Zeller-bach’s policies themselves. Third, the letter was directed to an outside party rather than to a Zellerbach decisionmaker or government official entrusted with responsibility for enforcing the equal opportunity laws. In spite of these unusual aspects of the appellants’ opposition conduct, the dis
1
Although the issue is not presented here, our circuit’s test to establish the causal link for purposes of making out a prima facie case may differ from that articulated by the Eleventh Circuit in Payne. We have stated that the prima facie case is established if the employee shows that he was discharged “following protected activities of which the employer was aware.” Aguirre v. Chula Vista Sanitary Service, 542 F.2d 779, 781 (9th Cir.1976).