I didn't read all of them cause i stuck in the very first one:
How do we know that's not fulfilled ?"...there shall be some standing here, which shall not taste of death, till they see the Son of Man coming in his kingdom."
Why is assumed that he is talking about his second coming as we know it ? couldn't he just came back after a while and none noticed but only those meant to ?
"coming in his kingdom" and "my kingdom is not of this world" tie nicely together, couldn't be that some actually did see him ascent or something ?
i don't see a problem here...