On the other hand, getting their TAX EXCEMPT STATUS REVOKED or something like that WILL get their attention! And would be worth the time and effort.
These guys are simply misguided ecumenicals who don’t understand the scriptural nuances about nations, cultural degradation, and plundering. I would venture to say that members of this ecumenical group haven’t lost children to drunk driving illegals or had a spouse raped, property stolen or family member beaten up by a gang. Probably none of them have ever waited in an emergency room full of illegals, or had to compete with illegals for jobs. But, I could be wrong. They could just be really stupid, unthinking people with big hearts. Whatever the case, I agree that the advocates of open borders and amnesty should tone down their hateful rhetoric.
A very effective way to deal with things like this would be to go to their events and publicly point out how they’re lying. I’m not suggesting engaging in a rant, only pointing out their lies in public. And, upload the exchange to a video sharing site. Without credibility no one is going to take what they say seriously. And, that will send a message to the others, like Wallis and Mahony.