Beware the Leaven of the Pharisees

There is a connection between the Crucifiction of the Messiah and
Passover. The Crucifiction was brought about by the errant
teachings of the Sadducees and Pharisees � the Jewish religious leaders
at that time. They interpreted Scripture, the Torah, in such a way as
to justify their Crucifiction of the Messiah. The claim and allegation of
Christianity, of course, is that they errantly interpreted Scripture,
and that "sinful" (=errant, wrong) interpretation of Scripture lead to a
"sinful" (=errant, wrong) act. I understand that the Messiah poetically
called these errant interpretations of the Sadducees and Pharisees
"leaven":

Mt 16:6,11-12 Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees� How is it that ye do not understand that I spake [it] not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees? Then understood they how that he bade [them] not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees .

This reference to "leaven" further connects to Passover, the
Feast of Un-leavened Bread, when the Jews are
forbidden to eat leaven:

Exodus 12:15 Seven days you shall eat unleavened bread. On the first day you shall remove leaven out of your houses, for if anyone eats what is leavened, from the first day until the seventh day, that person shall be cut off from Israel.

Is there a connection here?