The precedent you mention is in reality the fact that the mother of all Parliaments has just whelped a devil.
A majority voted for brexit.
A majority voted for article 50
A majority of MPs stood for re-election on a party ticket of brexit.

Now the cabal of remainers have overturned the will of the executive.

If MPs can overturn the executive perhaps 17.5,000,000 brexiteers can overturn the country.

A very dangerous precedent has been set and the loser is democracy.

No matter how you wish to dress it up the will of the majority has been thwarted, as has democracy. For Britain this puts us in potentially dangerous territory.
It is a battle between nationalism and multinational driven globalism. A battle fought in America where Trump won.
    In the EU their is a chance that Macron will win, he is already bleating about Britain remaining in the EU is destroying his vision of a United States of Europe.

There is far far more at stake than simply membership of the EU.
Time a few woke up to the true agenda.