What reasons does the author give the support the claim that it is difficult for a message to move people to take action?

"An explanation of why social media messages that are not extreme are sometimes ineffective".

"A quotation from an expert on why postings without religious elements work in the short term".

In this he was trying to say about how some messages online will not e effective specially if they are aggressive.

In the second one, messages with religious content can attract people in the Middle East.