Why was the race restarted at Hockenhiem in 2001?

Question

the race was restarted at hockenhiem in 200 when the minardi of some one verti... banged on rubens and schumis car later they both started again in spare cars wasn't this partiality and favouring them...

heres the video-

http://formularacin.blogspot.com

or

http://formularacin.blogspot.com/2008/07/videos-of-2001200220032004-2006-f-1.html

Answer 1

no more answers as Tim has it spot on

Answer 2

It was Luciano Burti's Prost that hit Schumacher's Ferrari meaning that the race was red flagged. The Minardis were originally starting from the pit lane but due to the red flag they were then allowed to start from their original grid positions.