Will a Reptilian imposter of a human who must think and act like their human subject possibly become more human-like and develop sympathy or softer views about inhumane actions?

This is an intriguing insight you have had here, and is very much true. When the Reptilians become imposters of humans, taking the role of this human subject and having to act in their stead puts them directly in the role of pupil and they must take on the part with a high degree of fidelity to the morals and ethics as well as the factual knowledge base of their subject. In this way, they are forced to see all the issues facing them as that human and consider all the constraints that would operate on the human themselves, and in this way will experience the conflicting motives and sensibilities humans do when there are competing interests, when they need to live up to certain standards expected of them, and have their own inner doubts, fears and impressions, as well as yearnings to achieve things, to meet their own expectations in keeping with their own self-image, as well as those things that are calculated to appease others and conform to wider expectations in their role in society. These opportunities to be in the shoes of a human being are not only demanding and instructive, they can have some influence on the outlook and perspective of the Reptilian being themselves and this can also serve to soften their heart a bit. It can go the other way as well, if they find the role a draining and irritating one because it is too outside their own experience in their own way of thinking and operating, so much will depend on the particular Reptilian being chosen for the assignment of imposter. Some are tougher customers than others. There are Reptilians who are more flexible and have a potential to moderate their opinions to some extent at least. This may be enough to prevent certain catastrophic things from happening. This is how the divine realm can work to shift what happens. We can use a moment of hesitation about carrying out a drastic action that could result in the demise of the Reptilian itself, to have a self-serving desire to delay such a prospect. To keep the game going allows the divine realm to make that more likely, and then there may be a gentler future unfold.