One must firmly protest these orgies of formalism, with which even technicians are getting harassed today.
(Literally: with which one is beginning to harass even technicians today.) To your questions:
Techniker is for technicians, engineers, graduates of the Technische Hochschule where Weyl gave these lectures, as opposed to scientists or graduates of the University. Applied, not pure.
sogar definitely applies to Techniker, not to heute.
belästigen = harass, molest, bother, annoy, irritate, badger, pester, trouble, importune, persecute.