I can say how you should NOT try to stop them getting terrorist. Liek the US has done in the last 15 years.

The US financed and trained (I love to point that out, sorry) terror group Al Kaida was a small group when they crashed the planes in the towers.

Then the US started to bomb them.

They 10-folded in size after a few yerars.

Then the bombing was even stronger, Al Kaide partly destroyed.

ISIS, once an even smaller group, stepped in and took over the Al Kaida areas.

Very successful War on Terror! For the terrorists.