Even if Romans 11 isn't about being cut off from Christ in salvation (but it is) the point I made was the partaking is conditional on 'continuing in his kindness', not as is being argued that the 'continuing' remains because of the partaking. That is what me and discern are discussing.
But the tense of the verb "made partakers" is perfect tense. If it is conditional on something we do in the future, how could it be stated as a perfect tense verb?