You are dead wrong. Not only Shell been attacked, it all oil and gas companies in that area.
Adeollu is correct, virtually all oil and gas companies
operating in the oil rich Niger delta have been at one
or the other have their facilities attack or staff
kidnapped. This has loss to colossal loss of revenue to
government and oil & gas companies.
It is a terrible situation that even some government
top shots in the area have one of their close family
member kidnapped for ransom payment.
The good news is that the situation is now calm and normal
operations and activities are gradually been normalized
again. The new people in the helm of governments and
NDDC are doing noble to put the situation under control