Right. You are reducing yourself to the level of radical Muslims (or, if you're not there yet, you are well within eyeshot) by appearing to condone a possible crime against the regulars.
If it was a mosque that produced what we normally expect from Islam: - beautiful, giving people: generous and warm, who form a valuable part of society - then this looks like ill-informed arson from a non-muslim, or well-informed arson from an radical sect.
If however it was a mosque or madrassa that produced hate-filled human bombs, freeway snipers and SUV Mall-Warriors - then burning it down would be an act of self-defence.
There's no way to tell which it is from the article.
Yep those poor muslim victims - of a muslim TERRORIST under FBI investigation who set fires to cover part of the evidence. Those poor misunderstood muslims. Read the link.
If You think it is going down to the muslims level to enjoy the fact that the fires They set deprive them of their US headquarters then you have a totally different set of ethics than any I am even familiar with.