You people should work strategically. You people should authorise a person to deal on behalf of all persons of group. The report of police that the matter involved is of civil dispute is incorrect. Your case is of cheating and forgery etc and there are several incidents of such fraud and cheatings by various renowned builders. You should file protest petition against the police report. Mere filing of FIR does not amount to defamation unless other conditions are not full filled. In your case no case of section 211 is made out on various grounds.
1. No, it is not a case of false FIR. Court has to proceed in terms of law. Case is required to be contested properly.
2. It depends upon wisdom of society.
3. No case of defamation is made out. Mere filing of FIR does not amount to defamation unless other conditions are fulfilled.