As a Charismatic, I take Umbrage at the idea that it's "insulting" a church to suggest that the congregants are practicing Charismatic prayer.
Now if it's not true, then it's false ... but it would false to say that they were speaking Greek, too.
p.s., I got your joke about marrying the church. It was cute.
(Now excuse me, the Umbrage is making me dizzy and I have to lie down.)
It could have been better expressed . . . but the WaPo was clearly using the "speaking in tongues" as a slam. The writer understood (correctly, I think) that the WaPo holds no brief for charismatics and was just trying to make the church look as weird and Bible-thumping backwoods as possible. They probably would have claimed they saw people in overalls and brogans kissing rattlesnakes and drinking strychnine, if they thought anybody would believe them.
A mainline Episcopalian was insulted -- but the WaPo intended to insult him.