Social Justice versus Charity, what does God want?

When I was at synagogue this week, and the Rabbi did his usual thing before High Holidays (Rosh Hashana and Yom Kippur).  He asked the congregation what was on its mind and let anyone who raised a hand talk for one minute.  Some comments had a leftist slant.

The one that bothered me the most had to do with the biblical admonition to leave the corners of one's field un-reaped, so as to allow passers-by to have food to eat.

Fine.  I understand this.  It's about charity, right?  The bible instructs us how to be charitable and provide for those less fortunate.  I don't have a problem with that.

What bothers me is when people take a passage like this and state that it stands for Social Justice, in the socialist/marxist sense.  That the state should take the goods of others by FORCE and redistribute it to others.  Wrong.  The bible does not say this, and I disagree that God is a Marxist.

I think God wants us to be our best selves.  And I stand with American Conservatives, who are among the kindest and most charitable people in the world.