I suppose for all the talk of conservative evangelicals about wanting to be like Jesus and extend fellowship to those considered spiritual outcasts in society, as many perceive Wiccans and Pagans, apparently this pushed the boundaries of acceptability and comfort for the Foursquare folks. This kind of response by churches to cutting-edge ministry to groups that are bogeyemen for evangelicals is unfortunately not uncommon.
Interested readers might want to visit Phil's website to learn more about his ministry, including his dialogue with Pagans called "Circle and Cross Talk."
UPDATE NOV. 1: Phil recently made me aware of the that broke this story which appeared in "The Wall Street Journal". The article can be found here. The article has some interesting quotes, including a statement from a United Methodist pastor in Salem who stated that Phil appeared "too familiar, too cozy, too amicable with that [Wiccan] community." Another comes from a Foursquare official who stated that "Phil had a strategy and methodology that was significantly different from how we perceive church life." Both of these statements are revealing, and indicate where not only Foursquare Church may be on different approaches at interacting with Pagans, but where many evangelicals are likely at as well.