synagogues are like churches. they are buildings.
The crufixion of Jesus Christ. In those prior the crufixion there were the rites with lambs were executed in synagoges through the whole region. After the crufixion the rites were abolised a now you see changing of times and the concept of church.
Some Jews were physically attacked and even killed in public places already in 1933, but the numbers were small at that stage. When the Nazis took over Austria in March 1938 there was an explosion of Jew-baiting in parts of Vienna: many Jews were beaten up and some were forced to sweep the streets with toothbrushes while onlookers hooted with laughter. The next major series of physical attacks was in November 1938 (Night of the Broken Glass). Bear in mind that there was physical violence against practically all inmates in concentration camps. In other words, violence had been used long before the start of World War 2.