That applies for free open source projects, but if you work in support, get paid for it and take the things personally, the job is not for you. In many cases,

That applies for free open source projects, but if you work in support, get paid for it and take the things personally, the job is not for you. In many cases, customers arguably have a right to be angry, because your company delivered a shitty product. You happen to be the target of that, because where else are they going to direct it? It's the same with police. If you can't stay calm when people behave like asses, the job is not for you. Staying calm and collected is part of your job description. Deal with it or look for another job.