Job 1 and 2 is quite clear that Satan touched Job's possessions, family, and smote him with God's persmission. We see the same thing in Luke 22:

Luke 22:31-32 And the Lord said, Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat: But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren.

Satan is God's dog - he can only go so far on his leash - only as far as God allows. But that doesn't make God responsible for what Satan does, or the cause of what Satan does.