Vinegar Made From Wine
In principal, when the cuase of Hurmat, is not more, the haram becomes halal. There is not basis for considering human involvement in converting wine into vinegar haram. The prophet’s prohibition seems rightly ascribed to the preemtive measure to make Musims discard wine altogether.
The same can be said on Hazrat Umar’s statment. It might be a preemptive measure. Principle cannot be compromised for an understanding or application which seems going wrong or inconsistent with the principle, we have to interprete in accordance with the principle or have to discard it, if we cannot interprete it in accordance with the principle.