The message of those looking to recruit is sent through social media and the internet. The internet and computer access has grown to worldwide. Computers used to be very expensive and not portable but we have entered an age of portable computers and internet access via handheld devices. This spread and growth has made recruiting and radicalizing individuals for terrorist organizations even easier.
The retweets of the small messages provide for repetition of small messages and conditioning for the audience to believe the material to be true.
Twitter accounts that are ISIS supporters tweet 6 times the amount of ISIS opponents. This is an alarming rate as they have 6 times the content. Via the internet, people can be 6 times more exposed to ISIS proponents than opponents.
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The ISIS community on twitter has many subcategories that focus on different issues.
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Furthering the ISIS ideology through spreading images and videos that romanticize killing non believers and reinforcing "us vs them".
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ISIS is just one example of a terrorist organization that radicalizes people online.
