I always took 'love thy neighbour as thyself' or 'love your enemies' to relate to psychological attitude, that is try not live with too much hatred, spite, disapproval etc. in your 'heart'. For your own sake.
There is a similar idea in Buddhist philosophy, in fact Buddhism expresses it better.
I don't think it means you should physically leave yourself open to attack from people who are hostile to you or allow others to carry out wicked acts.
I think this is quite topical. People must be stopped from committing murder, abusing others, cheating and so on, but to have a vitriolic hated in you for these people, and a wish to see them suffer, is an added, unnecessary extra.
Nicola Sturgeon’s husband Peter Murrell re-arrested over SNP finances.