As painful as this is I have to agree with Kalaam again, to be in intellectually honest I have to. I hope you all realize how difficult it is for me.
G-D made it clear what the purpose of jews eating unleavened bread is, it's stated here.
Exodus - Chapter 12 (Parshah Bo) - Exodus - Torah - Bible
14. And this day shall be for you as a memorial, and you shall celebrate it as a festival for the Lord; throughout your generations, you shall celebrate it as an everlasting statute. יד. וְהָיָה הַיּוֹם הַזֶּה לָכֶם לְזִכָּרוֹן וְחַגֹּתֶם אֹתוֹ חַג לַי־הֹוָ־ה לְדֹרֹתֵיכֶם חֻקַּת עוֹלָם תְּחָגֻּהוּ:
15. For seven days you shall eat unleavened cakes, but on the preceding day you shall clear away all leaven from your houses, for whoever eats leaven from the first day until the seventh day that soul shall be cut off from Israel. טו. שִׁבְעַת יָמִים מַצּוֹת תֹּאכֵלוּ אַךְ בַּיּוֹם הָרִאשׁוֹן תַּשְׁבִּיתוּ שְּׂאֹר מִבָּתֵּיכֶם כִּי כָּל אֹכֵל חָמֵץ וְנִכְרְתָה הַנֶּפֶשׁ הַהִוא מִיִּשְׂרָאֵל מִיּוֹם הָרִאשֹׁן עַד יוֹם הַשְּׁבִעִי:
16. And on the first day there shall be a holy convocation, and on the seventh day you shall have a holy convocation; no work may be performed on them, but what is eaten by any soul that alone may be performed for you. טז. וּבַיּוֹם הָרִאשׁוֹן מִקְרָא קֹדֶשׁ וּבַיּוֹם הַשְּׁבִיעִי מִקְרָא קֹדֶשׁ יִהְיֶה לָכֶם כָּל מְלָאכָה לֹא יֵעָשֶׂה בָהֶם אַךְ אֲשֶׁר יֵאָכֵל לְכָל נֶפֶשׁ הוּא לְבַדּוֹ יֵעָשֶׂה לָכֶם:
17
. And you shall watch over the unleavened cakes, for on this very day I have taken your legions out of the land of Egypt, and you shall observe this day throughout your generations, [as] an everlasting statute. יז. וּשְׁמַרְתֶּם אֶת הַמַּצּוֹת כִּי בְּעֶצֶם הַיּוֹם הַזֶּה הוֹצֵאתִי אֶת צִבְאוֹתֵיכֶם מֵאֶרֶץ מִצְרָיִם וּשְׁמַרְתֶּם אֶת הַיּוֹם הַזֶּה לְדֹרֹתֵיכֶם חֻקַּת עוֹלָם:
18. In the first [month], on the fourteenth day of the month in the evening, you shall eat unleavened cakes, until the twenty first day of the month in the evening. יח. בָּרִאשֹׁן בְּאַרְבָּעָה עָשָׂר יוֹם לַחֹדֶשׁ בָּעֶרֶב תֹּאכְלוּ מַצֹּת עַד יוֹם הָאֶחָד וְעֶשְׂרִים לַחֹדֶשׁ בָּעָרֶב:
19. For seven days, leavening shall not be found in your houses, for whoever eats leavening that soul shall be cut off from the community of Israel, both among the strangers and the native born of the land. יט. שִׁבְעַת יָמִים שְׂאֹר לֹא יִמָּצֵא בְּבָתֵּיכֶם כִּי כָּל אֹכֵל מַחְמֶצֶת וְנִכְרְתָה הַנֶּפֶשׁ הַהִוא מֵעֲדַת יִשְׂרָאֵל בַּגֵּר וּבְאֶזְרַח הָאָרֶץ:
20. You shall not eat any leavening; throughout all your dwellings you shall eat unleavened cakes."
For jesus to pick up the unleavened bread (matzah) and say it symbolizes his body is at best

and at worst a direct challenge to the authority of G-D.
And that the wine is supposed to symbolize his blood is just as absurd.
I realize that this is christianity, but as I said, you can't believe in both the Torah and the NT, they are mutually exclusive. You either believe what G-D said or what jesus said, you can't believe both, because they are completely contradictory.
You either believe what G-D said that there is only him, and not worship any being/man in any manner other than him, or you believe jesus that he was a divine being.