If he can prove that the banks illegally foreclosed, that’s one thing. But he can’t just claim that’s the case, break into a house, and hope he wins his case against the bank. The houses are a lost cause for his clients. If there really is an issue with illegal foreclosure, he needs to sue the bank after the house has been taken, which I suspect will become big business soon.
As it is, unless he can prove wrongdoing right now, he should be charged with breaking and entering for every one of these cases.
His work is pointless anyway, since these people would just be foreclosed on again.