What part of "I'm not saying you can't get pains from a keyboard" is unclear, would you say?
As you seem to have missed it, the author isn't positioning himself as a dogmatist using the mouse. He is calling Unix users who don't use the mouse dogmatists.
As you seem to have missed it, the author isn't positioning himself as a dogmatist using the mouse. He is calling Unix users who don't use the mouse dogmatists.