Quote - Specifically, in English law at least, a EULA cannot grant rights to commit an illegal act, (in your example, murder) nor can it enforce an illegal condition on the purchaser. Since contracts can be challenged in court, and to this date a standard EULA for software has never been successfully challenged, your comparison is invalid, not a fair comparison and quite a bit silly.

I shall change a little my EULA:

"You cannot use a knife from SicoKnivesCorp to kill people"

Now you are in your home and a bandit invade your home and attack your wife, you take the purchased knife and kill the bandit. You have violated the EULA and so, you are a criminal.

The Constitution grants you the right of self defense, and you have used your Constitutional right. But the EULA denies you this right. As the Constitution is above any EULA, this EULA clause has no legal value and you are not a criminal.

Stupidity also evolves!