have been studying the Olivet Discourse intensly of late and noticed a few things. Jesus uses the phrase 'all these things' or 'these things' at the beginning and end of the Discourse as a one phrase overview of what He teaches concerning the sign of His coming and the end of the age.
At the beginning of the Olivet Discourse His disciple ask Him:
'Tell us, when shall these things be? and what shall be the sign when all these things shall be fulfilled?' Mark 13:4.
At the end of the Olivet Discourse He says:
'And he spake to them a parable; Behold the fig tree, and all the trees; 30When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand.31 So likewise ye, when ye see these things come to pass, know ye that the kingdom of God is nigh at hand.' Luke 21.29-31
It looks quite clear that this is a one phrase overview of the 'end of the age.'
If these things be true then there are scripturally a couple things to notice from Luke 21.28-32.
'And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh
29And he spake to them a parable; Behold the fig tree, and all the trees; 30When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand. 31 So likewise ye, when ye see these things come to pass, know ye that the kingdom of God is nigh at hand. 32Verily I say unto you, This generation shall not pass away, till all be fulfilled'
There are two different people groups in relation to 'all these things'/'these things.'
1.)There are those who will only see the beginning of 'these things' before their redemption. These woud be those found 'worthy' and escape 'all these things' of Luke 21.36; these would also be those that escape judgment as Noah did by the rapture described in Matt. 24.37-43.
2.)But there are also those who will see 'these things come to pass;' these ones will see and experience every thing Jesus teaches concering the end of the age
There is a redemption for both groups of people.
Those that escape 'all these things' will not experience the affliction/trbulation of Matt. 24.9-14 before the setting up of the abomination of Matt. 24.15 nor the great tribulation after the setting of othe abomination of desolation of Matt. 24.21.
Jesus then teaches a pre tribulation and great tribulation escape/rapture in the Olivet Discourse.
The worthy will escape 'all these things' by the rapture.
Let's go! 
