As is usual in these cases, reporting on the events is contradictory. Both Jews and Arabs accuse each other of making a pogrom. Cars and shops have been smashed and about a dozen Arab houses have been torched. Both groups have suffered heavily in terms of property damage, although no victims have been reported.
However, what is not disputed is the incident that triggered the riots. According to Haaretz:
The riots, some of the worst the city has seen in years, began around midnight on Wednesday after an Arab resident of the Old City of Acre drove his car into a predominantly Jewish neighborhood in eastern Acre, where he said he lived. Jewish teens at the scene said the Arab man was deliberately making noise and smoking cigarettes. The teens attacked the man and shortly afterward, a group of Arab teens arrived at the scene, igniting a riot.
I personally don't like people who make noises and smoke. I prefer quiet nonsmokers. That said, I acknowledge that neither activity is illegal.
The problem here, however, is that both operating machines (such as cars or CD players) and smoking are forbidden during Yom Kipur, and the Jewish population saw the Arab's attitude as a provocation.
And do you know what this reminds me of? The Danish cartoons of Muhammad. The Muslims were enraged at the clearly provocative cartoons, but, remember?, they should have kept rational. After all, they have no right to force their beliefs on European Christians.
I'm not seeing those who expounded that argument applying it to the situation in Acre. The Jews have no right to impose their superstitious ban on certain activities at given dates on the Arab citizenry of Israel. But the champions of rationalism who were quick to bash the Muslims for their reaction to the cartoons are suddenly understanding the Jewish ire at those who don't observe Yom Kipur -- or at least failing to condemn its irrationality and unequivocally assert that it was the Jews, not the Arabs, who started the riots after absurdly taking offense.
What's worse, the Israeli Arab leaders themselves have apologized for an individual Arab exercising his freedom! A declaration by notable Arab residents of Acre stated:
On Yom Kippur and all the Yom Kippurs, we respected, out of our own free will and sensitivity, the holiness of the day for Jews and refrained, almost every one of us, from violating its sanctity by declining to hold events and by not driving our cars. (...) We regret that a tiny minority of us did not take such care and chose to drive their cars in a Jewish neighborhood and hurt the feelings of their Jewish neighbors.
This statement is very telling of the state of Dhimmitude, or protected-minority status, in which Israeli Arabs live. As second-class citizens, they have to be very careful not to "hurt the feelings" of people who came to Acre only 60 years ago, when not a single member of the existing Arab population had ever in their life sighted a yarmulke. Of course, there's no reciprocation, and the Acre Jews freely drink beer, forbidden by Islam, during the Muslim holy month of Ramadan.
The response to the Arab notables' nonsensical mea culpa was a Jewish call posted on the Internet:
We will no longer buy anything from Arabs, we will not honor any of their holidays or any place of theirs. Arabs of Acre, go find your place in the villages. (...) A Jew is the son of a king, an Arab is the son of a dog.
This is a very irrational world we're living in.