Nobody is attacking fracing technology or companies; they are attacking the glut created by high-cost producers. OPEC cannot control oil price erosion by just cranking back their own production. The big increases in world supply have come from the US shale producers in particular. In fact OPEC procuction has held steady over the last few years with very little production increase.
OPEC decided that the only way to reduce the supply increases from the US was to drop the price so that high-cost US producers would no longer find it cost-effective to drill, drill, drill. As a result of OPEC's letting the price drop, many high-cost producers will have trouble getting the loans they need to drill more wells.
Another consequence of this oil price "shock" is the strain it puts on high-interest bonds/loans held by banks, which will be less inclined to lend to marginal producers, whose cashflow is reduced.
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