"justified anger" is correct and usable in written English.
You can use it when expressing that someone has a valid reason to be angry. For example, "Simon had every right to be angry at his employer due to his unfair treatment - it was a justifiable anger."
That is something that the protesters, with all their justified anger, ought not to forget, either.
"Her justified anger was outspoken regardless of whether that was in contravention of Labor party policy.
So tell me, is there a difference between bitterness and wholly justified anger?
Gee has been campaigning against what he sees as the city's entrenched racial disparities through the Justified Anger Coalition.
In responding with righteous and justified anger, President Obama said most of what needed to be said.
My fellow citizens, There is genuine and justified anger and anguish at the ghastly crime of gang rape committed last Sunday in Delhi.
Bill Clinton is speaking at the Aspen Ideas Festival, and he said just now, apropos of almost nothing (actually, during a long peroration on Nelson Mandela): "Every living soul on this planet has some highly-justified anger.
I knew people would be upset and angry – as I was – by the cuts to the library's opening hours, but we couldn't just sit back and hope that the storm of (justified) public anger would pass.
Narrowly focusing on balanced budgets - and only reacting when (justified) taxpayer anger emerges - are a narrow-minded way of governing for the long-term.
"The folks that are angry are absolutely justified in their anger".
Still, he argued that the high proportion of "no" votes came not from a rejection of the draft constitution, but rather from anger — justified or otherwise — at the Brotherhood.
