Question Part I:

In the Rav Noach zt”l’s shmooze on Parshas Bo, he asks why Klal Yisroel needed to put blood on the doorposts (i.e. why did they need a special zechus to be saved and not get killed with the bechoros of the Mitzrim?) They were the victims, not the oppressors! His answer is that there’s a chazal that says that when one asks for Hashem to bring judgement onto a person, the one who asks gets judged first. i.e. If you’re saying to Hashem that you believe people should be held accountable to midas hadin for their actions, then Hashem checks you out first to see if you hold up to that standard. Are you familiar with where that Chazal is?

Answer Part I:

Bava Kama 93a, 6 lines from the top: “Hamoseir din al chaveiro hu neenash techila המוסר דין על חבירו הוא נענש תםחילה…” Also Rosh Hashanah 16b.

Question Part II:

The question that still remains for me is where do you see that Klal Yisroel was davka asking for onshim for the Mitzrim? They just wanted to get out of there.

Answer Part II:

I will give two answers, one from svara and one from the verses themselves. The answer from reason is that the nature of a person who feels oppressed is to want to see justice done to the one who he feels has wronged him. That need for justice is innate in the mind of a person and isn’t contradictory to their own interest to be redeemed from the hands of their oppressor at the same time.
The answer from the verses is as follows. After looking into the mefarshim it seems there is basis to say that the difference is between the meaning of the words the Torah uses “tza’aka or za’aka” — an outcry which comes to express the need to be free from oppression, and “na’aka” — an outcry which comes to express injustice.

ועיין ברמב”ן על הפסוק ויהי בימים הרבים ההם, שבסוף דבריו ז”ל הביא דברי רש”י משם המדרש, הנ”ל. וכתב

ועל דרך הפשט, מנהג כל העבדים למלך בליעל רשע שהיו מצפים למותו, וכאשר ראו שמת, האנחו מאד ממלוך אדם חנף מרשיע מן הראשון, כי אמרו אבדה תקותי נגזרנו לנו, ויבחרו מות מחיים, וזה טעם נאקתם, כי נאקו נאקת חלל.