<human>: First I'll give some backstory:

Hello, I live in Los Angeles and my house has a shared cinder block wall with a neighbor. When I moved into the house, damage was already being done to both the wall itself and my concrete walkway. You can see roots under the cracks in the walkway. 

At one point the owner of this house was finding new renters and wanted me to pay half the cost to fix our wall. I said no, because the damage was done by his trees so I didn't think I was obligated to pay.

 He then decided that he would chop down the trees, but leave the stump plus the trunk up to the height of the wall (if he cut the whole tree down then the wall would just fall over on his side entirely) and just left the wall as it is.

Do I have any legal right to have him pay to fix the wall and repair the damage to my walkway caused by his trees? Should I have to pay half of the cost of fixing the wall (like he wanted)? Can I take him to small claims court over this if he refuses to address this?

Could you distill the essence of the text into 1-3 sentences?
<bot>: Neighbor's tree messed up our shared cinder block wall and my walkway, does he have to pay for the damages and replace the wall? Can I take him to court over this?