We still have no idea what was said in this rumored phone call, or to what extent the rumored call was responsible for a change in Russian plans. Given that lack of knowledge I can't see how the incident can be used as a basis for a conclusion, unless of course you've already reached the conclusion.
“The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary”
H.L. Mencken
Bookmarks