For those that do not know the political parties in Germany, the CSU is basically the Republicans, SPD are the Democrats & Grünen are the Greens (though more powerful in Germany).
And if they all agree on something (which is like nearly never), then you can pretty much take it as true. Through in the FDP (market liberals) and Pirates (popular party) and that Mayors comments are pretty much mute.
Also, I wonder what the Mayor's technical knowledge is of the whole LiMux actually is. When my mom complains about 'the internet not working again', I know she means she probably forgot to turn on the modem again, and not that her Ubuntu (yeah my 65y/o mother uses Ubuntu, she has no clue but knows what to click and what not) or her Firefox is somehow not working. So far her system has never had a problem! **
So I question if the Mayor even has enough ground to stand on to make such claims.
** contrary to the other parts of my (extended) family and friends that all use Windows. They are constantly calling because this or that won't work.