I kept kosher. There are countless transgressions that we constantly, albeit unknowingly do, some being minor and some being major. I would like to focus on the sin of Sinas Chinam. In Shemos, the first thing that the Torah records after Ya'akov's coming down to Egypt and the deaths of him and his children in Egypt, is the enslaving of the Children of Israel. What caused this enslavement to occur.
Different commentators say different things.
On this, there's an interesting Midrash. The Midrash brings an arguement between Rav and Shemuel. One said that it was the old king, however he just instituted new edicts and decrees. The other one said that the king was literally a new king. The Ibn Ezra says on this that Vayakam, arise, means to arise from outside of the royal family.