How Do We Behave?

[Emanuel]

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After that he orders several men to strap on swords and kill people. So mere hours after getting the first tablets (and I'll assume those had the same rules) he already breaks the 'no kill' rule.
[...]

I think I should clarify that the 6th commandment doesn't condemn killing, but murdering. There is a slight difference, but an important one. All murder is killing but not all killing is murder. What the 6th commandment forbids is unlawful killing, a.k.a. "murder". So, as long as the "killing" done by Moses is lawful/justified -from the perspective of the jewish law (torah), I mean- Moses was not breaking the 6th commandment. See the following link for more info:

http://www.levitt.com/hebrew/commandments.html#c6