If you don't have any historical knowledge and can't understand basic comparisons, you could read at least the first paragraph of the corresponding wiki page:
The Reichstag fire was an arson attack on the Reichstag building in Berlin on 27 February 1933. Marinus van der Lubbe, a young Dutch council communist, was caught at the scene of the fire and arrested for the crime. Van der Lubbe was an unemployed bricklayer who had recently arrived in Germany. He declared that he had started the fire and was tried and sentenced to death. The fire was used as evidence by the Nazi Party that communists were plotting against the German government. The event is seen as pivotal in the establishment of Nazi Germany.
The responsibility for the Reichstag fire remains an ongoing topic of debate and research. Historians disagree as to whether van der Lubbe acted alone, as he said, to protest the condition of the German working class. The Nazis accused the Comintern of the act. Some historians endorse the theory, proposed by the Communist Party, that the arson was planned and ordered by the Nazis as a false flag operation.