"I don't see any one human as 'worse' than another."
This is a problem. A very dangerous one in fact.
That combined with your wonderful capacity to love.
I'm too tired and had one too many glasses of wine to be particularly coherent atm! I'll come back over the weekend and try to be a little more eloquent.
However ... there are some very bad people in the world. This man might be one of the, even if he's nice to you.
I used to be like you. I thought being a good person was giving everyone a chance, In retrospect that was because I'd never spent time with anyone really fucked up. Until I did eventually meet someone very fucked up who I thought I could help with love.
Then, what I learnt was that - as other people are trying to help you understand, that actually, no I couldn't always help with love. People like that are dangerous to people like you who - innocent as you are - don't understand that yes, actually some humans are actually "worse" than others. And you are at risk of getting very hurt here. Not in a noble-sacrifice way, but in a tragic what-a-shame way.
Of course everyone was innocent as a baby at birth, but many years have passed since then, and this man is not an innocent child. I know nothing about his crime. But why did he kill someone, why really?