Tact can be very usefull in small teams where trust and coordination is important.
For large projects, with thousands of stake holders the bar to participate in a conversation should be high.
As we both say in Holland: we are not made of sugar. But go read Linus rant now and ask yourself: would this really classify as an inappropriate rant in Holland? Or are you just, parroting the default (mostly from the US) critique on Linus?
Because this whole 'Linus isn't tactfull' is a false comparision. He is more approachable than any other person in that sort of position. Since there isn't a big filter at the door based on who somebody is but there is a verbal filter at the table. Very egalitarian if you ask me. Very Dutch like.
And our directness is often referred to as rude. It would look better on you to not blindly follow in that judgement when it concerns others.
For example: >Maybe you can chalk your reaction to your apparent false sense of superiority over friendliness and, it seems, Americans
If out of the mouth of Linus would be one of those 'look at how insensitive Linus is' posts. Something with the pot and the kettle.