Why jews brake glass on their celebrations?

Answer 1

The Breaking of the Glass (Jewish Tradition)

"The breaking of the glass at the end of a wedding ceremony serves to remind of two very important aspects of a marriage. The bride and groom - and everyone - should consider these marriage vows as an irrevocable act - just as permanent and final as the breaking of this glass is unchangeable. But the breaking of the glass also is a warning of the frailty of a marriage. That sometimes a single thoughtless act, breech of trust, or infidelity can damage a marriage in ways that are very difficult to undo - just as it would be so difficult to undo the breaking of this glass. Knowing that this marriage is permanent, the bride and groom should strive to show each other the love and respect befitting their spouse and love of their life."

Answer 2

I suppose you mean "break" not "brake" and they don't, except in cheesy Hollywood movies where they do the toast and then all throw and break the glasses.

Of course in Hollywood they also have non Jewish people throwing wine glasses at fireplaces to break them after a celebratory drink.

Today's trivia:

According to intowine.com the term toast comes from the Romans dropping a burnt piece of bread into wine. The charcoal from the burnt bread would reduce the acidity of some of the bad wines the Romans had to drink.

Answer 3

So it will never be used for a less worthy occasion. That would be bad luck (or something).

Answer 4

Because they can afford new ones.