Vander.
Concerning what you said here.
"Actually I am saying that verses 27 -30 are all on the subject of 67-70 AD. Jesus mentions His second coming parousia in passing ..."
I'm sorry, as we see from those verses, Jesus is doing no such thing
29 “Immediately after the suffering of those days ( supposedly Jerusalem 70ce) the sun will be darkened, and the moon will not give its light; the stars will fall from heaven and the powers of heaven will be shaken.
30 Then the sign of the Son of Man will appear in heaven, (in 70..?) and then all the tribes of the earth will mourn, (in 70...?) and they will see ‘the Son of Man coming on the clouds of heaven’ with power and great glory. (In 70..?) 31 And he will send out his angels with a loud trumpet call, and they will gather (in 70..?) his elect from the four winds, from one end of heaven to the other.
You are most definitely saying that the second coming was in 70ce while at the same time trying to say it's future.
You are going to have trouble convincing Christians to believe the above verses were fulfilled in 70ce.