Wife has forcefully entered my parents house, how can my parents safeguard themselves?

I was married in May 2012 in kolkata (This was an arranged marriage through matrimonial site). Marriage happened at my parents place. Soon after marriage (within 5-6 days of marriage) we went to bangalore where i was already staying and working since 2010. Till date i am in bangalore staying in rented apartment where my wife was also staying with me. Our son was born on Oct 2017 in bangalore, he is currently 4 months old. My in-laws keep visiting bangalore every now and then and they had also visited before my son was born and stayed for almost 5 months. My wife and in-laws had started mentally torturing me since the day my son was born by threats of putting 498a, dv and other cases which are completely false. Till now we have not been able to figure out what their intentions are. In our 6 years of marriage she has hardly stayed with my parents for 12 days and that too when i used to visit them on vacations. My parents have visited me only once that too when my son was born and they were also humiliated, threatened and mentally tortured during their stay due to which they were forced to go back not being able to bear the harassment. Then my wife suddenly said that she wanted to go to kolkata to her parents place for which i agreed and dropped them there myself on Jan 2018. The day i dropped them the next day they went to Mahila thana and put a complaint against me and my parents (There accusations are also against my brother and sister-in-law who dont stay with my parents or anywhere near me). We went for mediation and the IO of mahila thana also could'nt find a clear reason of what they were complaining about and why. The result of the meeting was nothing and they did not proceed with the complaint also. Now my wife refuses to talk to me properly, provide information about my son properly and on a regular basis abuse, harass and mentally torture me and my parents. My parents had asked her to stop these abuses and harassment and amicably solve this issue, but all these requests have met with more allegations and harassment. We asked her to stop this behaviour, only then she would be allowed to visit my parents place, but they have created more ruckus by involving political people, threatening us with dire consequences. Recently she forcefully barged into my parents house and refuses to leave saying that she has a right to stay there, and she is continuing the mental harassment on my parents. Currently i am in bangalore and she is forcefully staying at my parents place. Even after my repeated requests to come back here in bangalore she is not giving a clear answer and keeps repeating the same accusations again and again. I am currently worried about my parents as they are very old and have no support system there as i am working here in bangalore. What steps i can take to safeguard my parents as my wife and in-laws are very nasty and violent and have connections with anti-social elements which they keep threatening us with.