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Two Midrashim and a Kisvei HaArizal set up this Hemshech.
Kol Dodi goes on Yetzias Mitzrayim and Moshiach because from Mitzrayim until Moshiach is one continuum.
An explanation for why Mitzrayim until Moshiach is one continuation is 1) Mitzrayim is the Kesser of the four (other) Galuyos, 2) All of Klipa is like Kesser so, in essence Mitzrayim is the truth of all the goluyos.
The discussion is about Katnus and Ein Sof (Tohu) being the same and Gadlus and G’vul (Tikun) being the same.
In Klipa the differences aren’t real they are external, thus they are all Kesser-like.
