Man, this guy just doesn't give up.
There we go again.
Rule of war #1 : Everyone kills innocent in war. Innocent died on the Lusitania. Innocents died in the blitz. Innocents died at Hiroshima, Nagasaki, Tokyo and Dresden. There's no magic guiding system on bombs, torpedoes and the like to protect innocents. If you don't like it, you'd better start thinking about anti-war protests.
The next two lines of your post have little relevance to each other. Both are relatively true, they just don't go together. Most wars are pointless, and WW I is no exception.
And of course Germany wanted to starve britain of resources. As for sinking every ship, well, given that passenger liners were often converted to also transport troops (from the commonwealth/USA (ammunitions)) while they were at it.
A note from a site regarding the Lusitania
NOVEMBER 1914
LUSITANIA's schedule is reduced to one round voyage per month.
To save Cunard incurring further expenses,
one boiler room is closed down and her maximum speed is
thereby reduced to 21 knots and her optimum cruising speed is down to 18 knots.
She is now regularly carrying large quantities of American made munitions home to England.
(
http://www.lusitania.net/)
Doesn't make the death of innocents any easier to swallow, of course. But considering the other possible freight of the ship, they fall in teh category of "collateral damage" which the Pentagon like so much. They just happened to be in the way. (and quite possibly the allies were fully aware that they were using civilians as human shields).
Serbia started the war, that too is true, but Germany, really the one to blame? Why, because they jumped in to side with their allies like everyone did at the time? (Russia jumped in to defend Serbia against Austria, then Germany to side with Austria against Russia, etc). No particular country is really to blame for World War I, but really rather all the alliances that were triggered in chain by the assassination.
Next, to adress your newest ineptitude.
"There have been so many Geneva conventians (sic) against chemicals used in war."
Wrong, wrong, wrong. The Geneva CONVENTIONS cover the treatment of prisonners and wounded in war, ie, battlefield humanitarism. The Red Cross and all that. There were four such : 1864, 1907, 1929 and 1949.
The Geneva protocol, which adressed use of gas, was signed in 1925. There's been only one such, followed by the 1992 Chemical Weapons Convention. Obviously, you can't blame the german for breaking a convention that wasn't even signed at the time they supposedly broke it.
Incidentaly your pure white snow allies used gas in world war I too.
Here's a list of incident related to gas use in world war I.
* World War I- the use of chemical agents in WWI caused an estimated 1,300,000 casualties, including 90,000 deaths.
* 1914- French begin using tear gas in grenades and Germans retaliate with tear gas in artillery shells. This was the first significant use of chemical warfare in WWI.
* April 22, 1915- Germans attack the French with chlorine gas at Ypres, France. This was the first significant use of chemical warfare in WWI.
* September 25, 1915- First British chemical weapons attack; chlorine gas is used against Germans at the Battle of Loos.
* February 26, 1918- Germans launch the first projectile attack against US troops with phosgene and chloropicrin shells. The first major use of gas against American forces.
* June 1918- Fist US use of gas in warfare.
* June 28, 1918- The US begins its formal chemical weapons program with the establishment of the Chemical Warfare Service.
(
http://www.wilpf.int.ch/disarm/chem.htm)
Yeah, they paid for it. Were made to pay for it so much in fact that it nearly killed their country and led to the rise of a certain person, Adolf Hitler by name.
Good thing they (Allies) didn't try more Germany-squishing after World War II.