The Nazis were the Germans...
Nazis transported the Jews by train mostly.
Most Germans who were not Nazis had to keep quiet about it.
Hitler saw Jews as inferior to ethnic Germans. He exploited German anti-Semitism to enable his genocidal plans.
the Nazis would kill them
He blamed Jews for Germany's problems and encouraged Germans to join the Nazis in attacking Jews.
to keep the Jews away from the Germans
The Nazis believed that Jews were an inferior race and they didn't want their own race to be 'contaminated'.
To make Germans think the Jews should be executed
There is something odd about the question. Do you perhaps mean Germans and Jews?
The German Nazis murdered Jews because Hitler led the Germans to believe that the Jews were the source of Germany's economic troubles, and that eliminating them would fix this, as well as other things, such as creating a pure breed of Germans, etc.
To make Germans think the Jews should be executed
they made the Jews wear the star of David and sent them to concentration camps
basically as soon as the Germans occupied a country, they would put the Jews into ghettos.
Hitler and his followers believed that the Germans were the master race.
It wasn't the Germans. Very confusing, yes. The Germans and the Nazis were in different groups, though they followed the same leader. It was the Nazis who wanted this so they could keep track of and control as many Jewish people as they could. _____________________ Most Nazis were Germans. Ordinary Germans were happy to go along with the Nazi's wishes as they benefited in ways such as getting the Jews' jobs or their houses or businesses.
There was no conflict, no war between the Jews and the Germans. If anything, many Jews were inclined to be pro-German. There was a completely unprovoked onslaught by the Nazis against the Jews, mainly because the Nazis regarded Jews as Communists - and Nazism saw the eradication of Communism at its key 'mission'.