Islamic terrorists are stupid or ?

We all know where it hurts most is in the Oil industry yet these terror twerps carry on killing simple ordinary people with no power to harm them or alter the scheme of things.
Is it that they realise this and do not wish to hurt their paymasters, because most oil establishments are virtually without any real heavy security.
Which tells me their just malicious mean excuses for human beings hiding behind a pathetic cause a subhuman cause an hideous excuse for a relligion corrupted and distorted