Being killed in a dream or just dying can simply imply being very emotionally devastated - badly hurt emotionally.

Killing other people would imply emotionally hurting others very severely. Having the similar action taking place in various different places would indicate that there is no "one place" - no positive place or time for this type of action.

Killing your dad would indicate hurting a core aspect of yourself. You may be emotionally hurting yourself in relation to those opinions which were meant for your own protection.

The True Self finds there is no reason for enjoying these dreams of killing and emotionally hurting people. (I don't know why) [Do you know why doing this might appeal to you? Perhaps you need to discover why.]