Fuel boycott

Nobody ever wants to pay "too much". Period. But when too much is too much?
Many agree that fueling up is painful in Italy and I join the chorus, but the real issue here is tax. Let's try to understand the picture.
As of today, the prices at the pump in Italy are the following:
Gasoline = 1.50 Euro/liter (7.60 US$/USgallon)
Diesel = 1.38 Euro/liter (7.00 US$/USgallon)
Total tax is 58% on gasoline and 51% on diesel. Tax weight is therefore:
0.87 Euro/liter (4.39 US$/USgallon)
0.70 Euro/liter (3.56 US$/USgallon)
I do understand "some" tax but this is a rip-off to me. Furthermore, I feel a naturally growing itch as I hardly see where my tax money is being put. No wonder I'm using the bicycle as much as I can.
Boycott oil now!