The Sabbath: murder does not count as work?

In the Old-Testament it demands that all people be killed that work on the Sabbath (last day of the 7 day week, however most refer to it as being Sunday instead of Saturday). This is a well-known portion of the Old-Testament, while it typically is dismissed by the modern "believers" as being a relic of the past, no longer of use in these days; it is still there, and could potentially resurface (nothing is impossible with fundamentalists). For those that have not seen what I am talking about, here it is...

 You shall keep the sabbath, because it is holy for you; every one who profanes it shall be put to death; whoever does any work on it, that soul shall be cut off from among his people. Six days shall work be done, but the seventh day is a sabbath of solemn rest, holy to the LORD; whoever does any work on the sabbath day shall be put to death. - Exodus 31:14-15

But not only is ridiculous rule in the Old-Testament, but they give an example of its application....

 While the people of Israel were in the wilderness, they found a man gathering sticks on the sabbath day. And those who found him gathering sticks brought him to Moses and Aaron, and to all the congregation. They put him in custody, because it had not been made plain what should be done to him. And the LORD said to Moses, "The man shall be put to death; all the congregation shall stone him with stones outside the camp." And all the congregation brought him outside the camp, and stoned him to death with stones, as the LORD commanded Moses. - Numbers 15:32-36

Regardless of whether this story actually happened, it just shows that the writers were intolerant, as well as barbaric. They were not intelligent enough to realize that this rule violates the rule against killing other people (Ten Commandments). Perhaps the message they are trying to convey is "don't kill other people, unless they disagree with you". Either way, this just puts into perspective the kind of nonsensical garbage the Bible is, as well as why it should not be taken seriously in modern times.