The implication of Kriat Yam Suf is that the Tum'ah of the right, the utterly defeated Mitzrayim, can no longer rule over Kedusha. It can only do so in collaboration with the Tum'ah of the left, which does have the power to rule over Kedusha. In short, regarding Tum'ah, the right became included in the left.
Note that Moshe Rabbeinu utterly provoked Mitzrayim, but avoided all conflict with Edom. Whereas he rejected all compromises offered by Par'oh, about Edom it says in Devarim 2:5:
אל תתגרו בם כי לא אתן לכם מארצם עד מדרך כף רגל
Do not provoke them, for I shall not give you of their land even a step of a foot.
Edom has power that Mitzrayim lacks. In confrontations between Yisrael and Edom, Yisrael may not provoke. This sets the stage for the seemingly unending Galut Edom, in which context also
Yishmael ruled 1300 years, over Eretz Yisrael. Until when will Galut Edom last? The above Pasuk answers עד מדר"ך, until
744. Accordingly, at מדר"ך years into the sixth millennium (5745), four
64-year "days" before the millenium's end, six 64-year "days" (
384 years) before year 6129. Rabbi Meir Kahane
called upon the Knesset to provoke the nations of the world and to declare the end of the exile.
Perhaps it can be said that, even though the Holocaust forced the issue, the creation of the State of Israel was a provocation that was 37 years before the proper time, and a compensating 37 years after מדר"ך will now have to pass before Yisrael can provoke Edom and prevail.
Without support of the Tum'ah of the left, the Tum'ah of the right will then also lose its control over Kedusha. Know, however, that Yishmael will not give up without a fight.
קו