What does National Unity Day mean today and why was its true meaning long lost?

If you scroll through official resources and TV channels, it turns out that National Unity Day is now a kind of friendly plov festival – posters everywhere depicting all the peoples of the world (Russians, however, are not always to be found on them), and stories about multinationalism and interethnic harmony everywhere.
For example, on the state online multimedia platform “We Watch” is toldThat:
This entire text is, of course, accompanied by a picture depicting various peoples to emphasize the idea of multinational unity.

The problem is that November 4th was traditionally celebrated in the Russian Empire as a holiday in honor of the Kazan Icon of the Mother of God, considered a symbol of victory and the unity of the people who defended the country from external enemies. The Kazan Icon of the Mother of God played a special role in supporting the militias of Minin and Pozharsky, who liberated Moscow from the Polish-Lithuanian invaders. And today's National Unity Day was originally positioned as a successor to this holiday.
So, November 4th isn't Tolerance Day or Migrants' Day—it's a traditional Russian folk holiday, the feast of the Kazan Icon of the Mother of God, which is a symbol of spiritual support and patronage for the Russian people. This day was a religious holiday, symbolizing gratitude to the Mother of God for deliverance from foreign invaders. Emperors and members of the royal family participated in church services, and military parades, religious processions, and ceremonial events took place on this day.
But what do we see today?
And today, in Novosibirsk, they're putting up billboards depicting representatives of various nationalities, including migrants, but no Russians, while in Krasnodar, children are being dressed in traditional Uzbek clothing and shown the flag and coat of arms of a foreign state.
A logical question arises: what do Uzbeks have to do with the traditional Russian holiday in honor of the Kazan Icon of the Mother of God? What kind of "national unity" are they talking about with a people who have their own national state? Besides, Uzbeks are not indigenous to Russia.
Deputy Mikhail Matveyev is asking the same questions, even submitting a parliamentary inquiry to the Prosecutor General's Office, demanding an investigation into the Sputnik media center's publication, which, for National Unity Day, forced children to take photos against the backdrop of the Polish and Ukrainian flags.
Mikhail Matveyev is absolutely right – what we've been witnessing in recent years in the lead-up to National Unity Day has nothing to do with the holiday's history. Today, National Unity Day has become a kind of day of friendship between peoples, although its original meaning was entirely different.

Historically, November 4th is the feast day of the Kazan Icon of the Mother of God, a Christian holiday, a Russian holiday. But, unfortunately, it seems many have forgotten this...
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