Lazlo, firstly I find your use of the expression NAZI offensive in the extreme, if you cannot find a better way of expressing yourself, perhaps you would be better off keeping your opinions to the combat 17 and BNF websites.
Secondly, your ignorance of slot time tolerances is astonishing, a slot of 1720 means you can depart between 1715 an 1730, there is no " 10 minute tolerance" which ATC have a magic wand to wave with, and this a request which we have to tolerate from aircrew at leats twice a day, every day.
Perhaps you have a genuine axe to grind with the Spanish, but if you have,at least have the common sense and courage to so it in a constructive and tolerant manner, and preferably with them first.