"Esp. knowing the far-right culture of Milwaukee. "
Guess you don't know what you don't know. Milwaukee is the other half of the liberal Madison equation that gets Dems elected in Wisconsin.
As far as Sihks are concerned: they are well respected businessmen throughout the area. Besides being successful in business, they have been very generous contributors to many area charities. They are totally peace loving and self sufficient people, who are never involved in community agitating.
My guess is you can chalk this one up to another lone pea brain. We may know more after the presser in the Oak Creek police hdqr's in the morning.