Dreams like this can be quite intense and often reflect deep-seated emotions and concerns. In your partner's dream, the imagery of mass destruction and isolation may symbolize feelings of powerlessness or anxiety about the state of the world. The act of killing everyone except you and him could indicate a desire for control or a fear of losing connection with others.

The dying cat might represent loss or grief, suggesting that even the things we care about can be vulnerable. Your partner's indifference to seeking out others suggests a potential fear of change or a reluctance to engage with the outside world, possibly tied to feelings of inadequacy or communication barriers.

This dream might be urging your partner to explore feelings of loneliness, the importance of community, and the desire for connection despite obstacles. It could also reflect a subconscious processing of current events or personal feelings about relationships and the world at large.

Encouraging open dialogue about these feelings and concerns could be beneficial, as it may help your partner to unpack the emotions tied to this dream.