Covenant theology is explicitly taught in the NC Scriptures, see e.g. the Lord's supper, Peter's sermons in Acts, & particularly Hebrews.
Why is Coccieus (seventeenth century) the Father of covenant theology then?
Peter and the author of Hebrews never spiritualized the covenant promise of land to Abraham (ie the Jews), why do you?
Preterism is understood by reading Revelation alongside the Olivet prophecy. Jesus' warnings are about to be fulfilled. First C history records that fulfillment.
You need to read more church history. Try Irenaeus, or Hippolytus, post 70AD, who explicitly teaches that the seventieth week of Daniel is yet future.
The section of the Olivet prophecy that applies to us is:
Mat. 24:35 Heaven and earth shall pass away, but my words shall not pass away.
36 But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only. 37 But as the days of Noe were, so shall also the coming of the Son of man be. 38 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noe entered into the ark, 39 and knew not until the flood came, and took them all away; so shall also the coming of the Son of man be. 40 Then shall two be in the field; the one shall be taken, and the other left. 41 Two women shall be grinding at the mill; the one shall be taken, and the other left. 42 Watch therefore: for ye know not what hour your Lord doth come.
read on...
What about Matthew 24:20? Do you pray that your flight may not be on the sabbath or in the winter? I thought Paul taught we weren't to observe the Sabbath (Colossians)...