Questioning the Passover story

From the Israeli newspaper Haaretz, an op-ed piece questions whether Jews were ever enslaved in Egypt, and whether the Passover story is a myth.
"Even if we take the earliest possible date for Jewish slavery that the Bible suggests, the Jews were enslaved in Egypt a good three hundred years after the 1750 B.C. completion date of the pyramids. That is, of course, if they were ever slaves in Egypt at all...

...one of the biggest events of the Jewish calendar is predicated upon reminding the next generation every year of how the Egyptians were our cruel slave-masters, in a bondage that likely never happened... I'm talking about real proof; archeological evidence, state records and primary sources. Of these, nothing exists.

It is remarkable that Egyptian records make no mention of the sudden migration of what would have been nearly a quarter of their population... Furthermore, there is no evidence in Israel that shows a sudden influx of people from another culture at that time.

...let us enjoy our Seder and read the story by all means, but also remind those at the table who may forget that it is just a metaphor, and that there is no ancient animosity between Israelites and Egyptians. Because, if we want to re-establish that elusive peace with Egypt that so many worked so hard to build, we're all going to have to let go of our prejudices."
Addendum: A tip of the blogging cap to reader Drabkikker for finding this relevant Wikipedia page.