Here, the notion of intention is fundamental. Indeed, many tools are available for all, knowing that these tools may and can be used by people preparing and committing crimes. For example, car manufacturers know that cars are very useful to prepare or commit an offense (travel, flee, etc.). Similarly, many tools on the Internet, (email boxes, anonymization tools, encryption, etc.) are likely to be used for terrorism (or other crimes). However, neither the car manufacturers or developers of electronic tools intend to help the commission of offense. So this is the will and intention of aiding and abetting committing an offense that should be punishable and not only the knowledge.