.
Yeast is not the issue with unleavened bread; rather, it's all about age.
Given time, fresh dough will spoil on its own without the addition of yeasts and/or
starter because all flour, no matter how carefully it's milled and packaged, contains
a percentage of naturally-occurring fungi.
Back in the day, there were no sanitary, indoor facilities with which to grind flour;
in point of fact, they used stones exposed to the open air so their product was no
doubt contaminated with far more fungi than in our day; which means that back in
Moses' day-- and in Jesus' day too --there was no such thing as flour containing
zero yeasts. It all contained yeasts, more or less, and without refrigeration and
there was no practical way to stop fresh dough from fermenting.
Passover is supposed to be eaten with bread made from fresh dough rather than
dough that's given time to sit around long enough to spoil. Sourdough bread is safe
for human consumption, but it doesn't convey a sense of urgency. Fresh dough for
dinner bread is the dough of choice when people are in a hurry to get fed and get
going.
• Ex 12:11 . . This is how you are to eat it: with your cloak tucked into your belt,
your sandals on your feet and your staff in your hand. Eat it in haste.
Did you get this from Christian Apologetics 101? This sounds like a lengthy work around a clear instruction. "Didn't really mean yeast...just old". By the way, I make bread regularly, so I am familiar with how to make it, risen and un-risen, where yeast is necessary and where it's not, and how to cultivate yeast from flour, fruit etc. The biblical instruction is clear. No yeast, all yeast to be removed, and consume nothing made with yeast.
Jesus not only gave his men wine to drink the night of his last seder, but he himself
imbibed too.
• Matt 26:29 . . I tell you: I will not drink of this fruit of the vine from now on until
that day when I drink it anew with you in my Father's kingdom.
Now the thing is, most table wines are made from grapes that have a coating of
natural fungus on their skins which was impossible back then to keep out of the
juice when grapes were pressed. So the juice was already contaminated with yeast
even when served right out of the presses before it had a chance to age; and
seeing as how Passover is in the Spring prior to grape harvest, then it was nigh
unto impossible to obtain unfermented grape juice for seders. But no
matter seeing as how the ban on unleavened per the 12th chapter of Exodus
doesn't include beverages.
_
I suppose you may be unfamiliar with Matt 9:17, or fail to understand it's simple meaning. The new wine makes the wineskin "burst" because it ferments in the presence of yeast that arises from old fruit juice. The bible says "wine", but the meaning is clear - it is unfermented fruit juice. If it were an alcoholic drink as we know it, the saying would make no sense - as fermented wine would not burst a wineskin...it is already fermented and will not release any more C02. I make beer regularly and sometimes wine...so I am familiar with the process. I understand what is being said here while many people who don't/have never made alcohol wouldn't get it.
The story of Jesus turning water into "wine" is debatable on the point of whether it was fermented (alcoholic) or not. So too, the last supper.
Lastly, there is the Nazarite vow, which includes consuming nothing from the grapevine, fermented or no, all the days of one's life. Numbers 6:3. This is why Jesus said He will not partake of the cup until he drinks it "anew" in the Kingdom. So no, Jesus did not imbibe. I drink alcohol myself, but I'm not so blind as to not see that there are so many places in the bible where it is warned against and frowned upon that Jesus creating, drinking or encouraging what is basically a spoiled drink is highly speculative and probably wishful thinking.