UFC star Tony Ferguson pushed his wife, abducted their son and tore their house apart on several occasions ... this according to Tony's wife who says she's now afraid for all of their lives.
It's all spelled out in court docs obtained by TMZ Sports ... Cristina Ferguson says Tony has been "acting violent, paranoid and delusional for the past several months" and he needs help.
Cristina says Tony's behavior has been concerning for years -- but got significantly worse in 2017.
Since 2017, Cristina claims Tony has flown into manic episodes where he's destroyed property in their Santa Ana home -- including ripping off mirrors and dismantled appliances looking for tracking devices and cameras.