I have a freemason lodge right across the street from me. They are Christians who invite all faiths to worship God with them, and do community service work. There is nothing nefarious about it.
The Freemasons are a long standing organization which our founding fathers were a part of. Why should I believe that Christians like George Washington and others were part of an evil organization when I can just believe that anti-Christian groups are trying to demonize Christians?
If some reddit neckbeard is telling me that a Christian group is evil and bad, I am far more likely to think that the reddit neckbeard is a far left Christian-hating liberal. Who are these people making these claims against the Freemasons, exactly?
The same demonizing is made about the Knights of Templar, which were Catholic-Christians who opposed mass immigration and organized to protect their homeland.
Human nature is pretty good evidence that what he said is true.
If the Freemasons were once a righteous organization, as I believe they were in George Washington's time, then of course the forces of evil would target it for corruption. What we know about 20th century Freemasons suggests that the org was fully corrupted by then.