The main points in Stalin's speech were:
The need to fight Nazi Germany.Support the Red Army.Fighting Hitler and his ideology.Although you didn't show which speech your question refers to, when searching for it on the internet, I was able to find another question exactly yours, which showed the speech that Satalin gave during World War II, about the need for the USSR to fight the Germany.
In this speech, Stalin showed how the Red Army was far superior to the German Army and that for that reason, he could not let Hitler and Nazi Germany exploit the Soviets or threaten Soviet society.
Stalin's aim was to create a patriotic feeling in the population and to get popular support so that the USSR could participate in World War II, fighting the expansion of Nazi Germany.
At the link below you can find more information about this speech:
The speech was addressed to party members, army officers and officials. The main point was the victory against Germany, where it was proved that the Soviet social system has won, the capacity of the Red Army was demonstrated, clearing all the existing doubts, in its speech demonstrates an ideological hardening, which was interpreted as an alarm of war. A point of support was to describe the causes of the war, stating that it was not caused by Hitler but by the functioning of the capitalist system.
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