Interestingly, +Vigano seems to accept the Cardinal Siri election and subsequent "expulsion" as probable.
Speaking of the Deep Church, he writes:
"It began its own work of subversion a few years later, with the Second Vatican Ecuмenical Council, in view of which the ɛƖɛctıon of Roncalli and the expulsion of Cardinal Siri, Pacelli’s “dauphin” or probable successor as pope, represented a reason for enthusiasm both for the progressive and modernist element within the Church..."