Another Mass Shooting, this Time In Wisconsin

From jsonline:
At least seven people were killed, including one shooter, just after 10 a.m. Sunday at the Sikh Temple in Oak Creek, police said.
Four of the dead were inside the temple at 7512 S. Howell Ave. and three of the dead, including a shooter, were outside the temple.
A police SWAT team entered the building before noon and brought uninjured people out of the building, 7512 S. Howell Ave.
They started removing injured people from the temple's prayer room.
SWAT team members were still sweeping the building about 1 p.m. and an explosion was heard from the building at that time. It was unclear what the explosion was.
About six gunshots were heard at 2:30 p.m. in the area. The shots appeared to be coming from the temple.
The first officer on the scene Sunday morning encountered an active shooter and exchanged fire with him, according to Greenfield Police Chief Bradley Wentlandt who briefed media on the scene. 
The shooter went down and is believed to be dead, said Wentlandt. He said authorities had no evidence of a second shooter.
Wentlandt said the officer was hit multiple times, but is expected to survive. He said the officer was a 20-year veteran and "an extremely accomplished tactical officer." He was taken to Froedtert Hospital in Wauwatosa where he was in surgery just before 2 p.m.  http://www.jsonline.com/news/crime/reports-of-people-shot-at-sikh-temple-in-oak-creek-qc6cgc0-165059506.html
The media is already making this out to be a hate crime, but there is no evidence of this.  It could be a mentally ill person, someone looking for attention or something else. 
This is the second mass murder in the Milwaukee area as in 2005 a gunman killed 6 people.  http://www.ar15.com/forums/t_1_5/332938_Update_on_Brookfield_WI_Church_shooting________.html
If this is a hate crime, why a Sikh Temple?  They are a pretty passive group and they are usually victims of violence instead of creating violence.  So, if this is a hate crime against the Sikhs, I have to wonder why.
Update: A police officer was shot numerous times and either that cop or another then shot and killed the shooter.