I think that's a fundamental point which will be a sticking point for us. I do believe all life to be equal.   And I wouldn't say it's an absurd extreme to suggest that although I won't risk my life over that of an assailant, I do believe I have a duty to that person to not jump straight into killing them because they broke into a shop.

You're right it's not justice to treat the victim and assailant equally. But the punishment does need to fit the crime. 
Breaking and entering and looting are not proportional to getting shot. 

Not all life is equal. 

And you’re taking the concept of equal to absurd extremes. 

It’s not justice to treat the victim and assailant equally 

Bell_curve

Pro who's life? I was under the impression that the pro life stance was all life was equal.  And you've expressed a willingness to put yourself in a situation where you might not survive.  It doesn't sound to me like you're particularly pro your own life or the lives of petty thieves. 