Dying roots?

Here it is for a third time, a possible change of tack by Hamas:

Yihiyeh Musa, a Hamas member of the Palestinian Legislative Council, said Hamas had moved into a 'new era' which did not require suicide attacks.

'The suicide bombings happened in an exceptional period and they have now stopped,' he said. 'They came to an end as a change of belief.'

Hey, shouldn't someone tell them they can't do this, just changing their beliefs about such things? What about the root causes for suicide bombings? How rooty can they really be if they cause suicide bombings when they do, but also don't cause them when people change their minds? Or maybe it's that there are other, less often considered, root causes. From the same report:

Hamas is keen to gain acceptance from the international community.
.....
Many Palestinians believe that suicide bombing damaged their cause, portraying them, not Israel, as the aggressors.

'The occupation government with its outside allies succeeded in labelling all Palestinians as terrorists as a result of the suicide bombings,' said Musa.

These sentiments suggest that the views which others express about suicide bombing may have some influence upon organizations that consider using it as a weapon. Could that be a minor root cause itself, then - large numbers of well-meaning Western progressive folk letting it be known to would-be suicide-bomb strategists that there are root causes for what they're contemplating? I don't know. It's all a bit involved for me.