You may blame Saudi for Libya's supply disruptions. But I find that Libya was the ultimate source of their eventual supply disruptions. Same with Iran and the economic sanctions.
by restricting production in the past, Saudi Arabia state controlled cartels caused artificially high prices. now the artificially high oil price bubble is bursting .
this severe price drop is all caused by Saudi Arabia and OPEC STATE controlled cartels
in a free market price would be stable as no such artificially high prices would have existed for so long.