This was a major issue for me when I first purchased my first park. I did not liv on-site but I did self manage. I solved it very quickly by doing the following:
I immediately let the tenant know that I am not a mediator and will not get involved in personal disputes
I let them know that if they feel in danger they need to call the police immediately
I let them know that they need to get it resolved quickly because if it causes a disturbance in the park, both parties will not have their leases renewed and will be required to leave (assuming they are month to month)
I cannot say if this is the only or the best solution but after multiple episodes of this and my consistent response, I received no more of these type issues. I did evict a tenant who was involved in one of these squabbles for multiple reasons but I believe it was interpreted by the other tenants as me keeping my word that anyone causing disturbances will be removed. Regardless, the worse possible scenario is to get involved, and worse yet take sides. If you provide an answer when these situations arise they will continue indefinitely. If you insist they solve the problem themselves and stipulate there will be negative consequences if they do not, they will most likely stop coming to you. If there is someone who seems to be involved with every squabble in the park, it is best to remove them. They tend to be a cancer that spreads to everyone.