Pinochet's nomination cannot transform Frei's comments ex post facto. If you have any evidence of Frei commenting on Pinochet's alleged desire to protect the Chilean constituion, please show it now. Otherwise, you were caught claiming something that is not supported by the evidence of history and you should drop the subject.
Nor do they. You, however, seem to expect that Frei should have the ability to predict the future and thus anticipate which military commander would lead the ouster of Allende. The real point which you seek to obscure, of course, is not the military commander's name but rather the fact that Frei called on the military to oust Allende. Pinochet happened to be the commander of that military when it complied, and Frei, consistent and true to his previous word, supported him when it happened.