Just ban illegal aliens and deport them.
It's not "Cinco de Mayo" that is a problem.
It's just the sheer numbers of illegal invaders who celebrate it which are our problem.
There are plenty of all-American citizens of Mexican descent, and like all other Americans, they have the right to celebrate their ancestral heritage if they choose.
We Jews are faced with a rather unique situation, because of all peoples we were without our ancestral land for two thousand years.
We to a greater or lesser degree honored our Biblical history and mitzvot, and only 60 years ago witnessed the rebirth of a Jewish nation in our native land.
The Irish and Germans have never considered that their ancestral homeland would be erased from the face of the Earth.
We Americans of Jewish ancestry certainly now can honor our ancestral homeland's unique history, the same as the Irish honor their heritage.
Those who "accuse" Jews of "dual-loyalty" are the same ones who stop in the checkout line at the grocery store to stare at the "latest scoop on Prince Harry or Lady Di".
'Nuff said.