|  |     As far as I know there are two problems.  With d.s.t. in effect,
    shabat ends an hour later than it otherwise would.  The "status
    quo" in Israel allows buses to start operating at the end of shabat,
    and theatres to show movies, etc.  The theory according to the
    rabbinate is that, without d.s.t., even if these activities start 
    a little before shabat ends (as they often do), the great unwashed 
    masses of not-too committed Jews will not be forced to choose between 
    desecrating shabat and giving up movies and bus travel.  
                
    (Maybe we should open a whole other topic on what the "status quo"
    is and how it got that way.)
    
    But, with d.s.t., shabat ends an hour later, and the masses are
    not about to give up saturday night movies, etc.  There is actually
    good talmudic precedent for the rabbinate's concern; I am thinking
    of the discussion on the importance of not enacting laws and  decrees 
    that are not likely to be easily accepted and obeyed by the masses,
    in order not to a) cause many to sin and b) encourage the division
    instead of the unification of the community.  But I can't remember
    the source or the actual key-words of the discussion. And anyway,
    I digress, although the point about the rabbinate is that you can't
    attribute their attitude on this subject to simple hypocrisy; it
    has better grounds than that.
    
    Ah yes, the other point: lets say without d.s.t. dawn is at 5 a.m.,
    shema may be said until 6:30 a.m., and the average workday starts
    at 7:00.  With d.s.t, dawn is now at 6 a.m., shema may be said until
    7:30 BUT NOT BEFORE 6-SOMETHING (it has to actually BE morning when
    you say the morning prayers), and the workday still starts at
    7:00.  There are going to be people who can no longer easily, or
    perhaps at all, find time to pray in the morning before having
    to go to work.   That's the problem that religious Jews have with
    d.s.t. (the other problem is more a concern that religious Jews
    have for their non-religious fellows.)  
    
    I don't know what happens
    to people who work in agriculture, but my best guess (and partial
    non-ECCed memory) is that on religious kibbutzim and moshavot, 
    many farm-chores start VERY early, at break-of-day or even earlier
    for some animal-care chores, and after a couple hours work, workers
    come back to the settlement to pray and then have breakfast.
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