So we should allow burka clad women to have driver's license photos taken in full covering (to not offend their religious sensibilities?) Should we cease breaking up terror cells because, well after all they are just living their faith of killing the infidels? It is a very slippery slope both ways....
Did I say that? I don't think so. But there are processes to be followed. First their must be probable cause to believe a crime has been or is being committed. They got that with an apparently anonymous phone call, from someone they have not yet located, and who probably wasn't even in the "compound" to observe the goings on there.
Then they must have sufficient evidence, more than just probable cause or accusations unsupported by evidence, to believe a crime or crimes have been committed, and that specific individuals committed them. Then comes the trial with a higher standard of proof, beyond a reasonable doubt (probably, maybe beyond a shadow of doubt).
Then the jury can order 'em put in Huntsville and throw away the key. Or in a tent on Matagorda Island or St.Joseph Island for all I'd care then.