This news is being reported tentatively and in the passive mood. The churches burned or were burned. But that arson directed at an African-American church in the South after the Roof murders is likely the work of white supremacists is only hinted at. The ambiguity of thunderstorms is typically brought in, quoting local authorities. But there are lots of thunderstorms all the time in the South and churches have lightning rods. Why would a church that had stood for decades suddenly succumb to a single storm?
Shouldn’t the headline be “Suspected White supremacists burn down at least four African-American churches” ? Shouldn’t there be an agent, a doer, involved?