They guarded the concentration camps. They dealt with incoming and dead bodies. They tortured people if they had the notion to. They could shoot at will. They certainly did not take care of the living Jews.
ss men or gastapo
SS-Totenkopfverbände
At first (until July 1934) the Nazi concentration camps were run by the SA (Stormtroopers, 'Brownshirts'), but from mid 1934 they were run by the SS. Later the SS was also in charge of the 'Final Solution' and ran the extermination camps in Poland. The concentration camps were run by the SS-Totenkopfverbände (SS Death's Head units).
They were chosen from within the SS staff at concentration camps.
the SS
The SS did.
It was scary because you would never know what they could do
No way. They were SS men. Most Germans hated Jews so it was not a real stretch for the SS men to murder the Jews.
The SS ran the concentration camps and extermination camps and organized the holocaust.
They were run by the SS.
SS death's head
No. In 1933 when a number of SS men were charged with murder for killing the inmates of concentration camps, Himmler intervened. He not only had all the charges dropped but established the principle that SS men were immune from prosecution for killings of concentration camp inmates.