What opened the door? Jesus or 70 AD?

Larry Siegle "The complete removal of the Old Covenant system and the establishment of the New Covenant system opened the door (Note: Larry believes without 70AD the door would STILL be shut. Jesus own statements about "I am the door", was not in effect until 70AD according to Larry. Without 70 AD, people would still be in their sins and could not have salvation today.) for those willing and obedient to enter into salvation “in Christ” and to once again allow the covenantal blessings of heaven to be poured out upon them."

Source: preterist.wordpress.com/2008/11/08/when-paradise-is-restored-at-last/