Ki Tisa 5779

Darash Dovid: The Ketoret included the foul-smelling חלבונה to show that פושעי ישראל should be included when we daven. Why is this so important?

Rav Shimon Schwab on Betzalel and Ohaliav's lineage (Yehudah and Dan). Why did Betzalel need to know the letters with which Hashem created the world in order to build the Mishkan?

Why do we equate Torah observance with keeping Shabbos? Why is it so central?