To kill another being without good reason, especially if you are the kind of animal that depends on a society yourself, is simply an act of stupidity.
Doing so just to proove to yourself that you are really satanic even more so.
And yes, why not have those people erased who make this mistake to believe that you need to commit crimes to practice LHP. I've rarely seen opinions that reflect less strength and insight than such a mentality of whatever doing what some organization tells you (and the opposite of whatever another organization tells you.. which would be very interesting if the Pope would declare that jumping from church roofs is not good Christian practice. At least it would sort out the most stupid).
It's a crime in most states nowadays, for good reason; commiting it with somebody knowing about it gives that somebody power over you, as it will be in their hands to bring you to prison or to have you killed by the government (in most of Europe, I think, murderers are largely not punished with death, in opposite to some US areas, but even being in prison for some decades of years is not so much what will increase your possibilities to "do your will").
There have been societies in the past and maybe are even today, in which human sacrifice has been playing a role. Freedom and the possibility for some average person like the usual satanist might be was NOT the result of this ^^
So, c'mon people, to simply do the opposite of whatever law AND common sense say is really the most stupid and primitive form of "antagonism" that's ever possible, and increasing anything most people, and most average satanists as well, can wish for, is also not it's outcome.
Sure, you can "respect" people for consequently doing whatever they think they HAVE TO (oha, where's the freedom by the way?), without ever using their common sense, just because they want to follow some principles that have not even been created by themselves.
I prefer to do MY will, and that doesn't include to prove to the very stupid that I'm consequent. People can give me a good reason to act "consequently" and they might find out that I will ^^
"I am the flame ..." is not a good reason to randomly destroy some men.
And finally the question remains what makes you one of the elect, and what makes some other person one of the unimportant strangers that are "worthless" anyway. My personal experience is that this is not a question of qualification, true belief or a "true connection" to some deity, but in the end POLITICS. Get into some serious debate with the leaders of such a group and the next person "sacrificed" might be you. If they need to, they'll find a reason why particularly you are a traitor or whatever and deserve it, or why particularly you would make a good sacrifice. And if they had sufficient influence over your life before, maybe you won't even have sufficient connections to the outside to be missed by anyone.
Well, you guys can and might play such stupid games. This stupid "I do whatever some guy doesn't want to happen even if I'm cutting my own flesh, just because he's a Christian and I want to prove I am not" is really below the level I'd like to act ^^ It might be adequate for some people in puberty, to some degree, but adults? ...
In the end there are good reasons for some rules in society to exist, and to get rid of as much intelligence and wisdom is not what I'd call "becoming strong".
So back to the title: "How is human sacrifice a Satanic practice?" - Well, for me it is not. I regard it as an act of stupidity, most often not decided by the persons who will do it, giving other people power over you as long as you live in a state where it's a crime. The need to prove to someone how Satanic you are indicates weakness, for a real great individuum doesn't need to do something like that. In that sense it has not the least benefit, but quite a lot of disadvantages, BESIDES the fact that being a member of an organization that kills people might make your life, well, exciting ^^ Constant fear to be the next is really not what I would call a life in freedom.
But let the stupid judge themselves, hardly will I save anybody. More laugh about them when it's them who'll end on their stake or however they particularly do that.
Yes, it is part of Satanism, in the sense of doing whatever Christians don't want to happen, forgetting about the fact that living in a society in which you can be the next all the time is what MOST intelligent people wouldn't want to happen, including, usually, oneself. Most primitive and simple way EVER.
But well, nobody said that Satanists are better, right .. just that they are Anti-Christians. Some at least. None of such people should expect me to waste time on them. I prefer to deal with the strong, wise, intelligent and conscious beings. None of that fits to those. Satanists - well, why not. More than "worthless" - most probably not. But in opposite to them with that I refer to personalities, characters, decisions and opinions, and not just the the question whether some group leader declares someone as "worthless". I think it takes already some degree of stupidity to even enter a group that declares it will bring fear and constant pain to your life. But everybody decide for themselves. Maybe the very weak need something like that.
Greetz,
SJ