Simplify the following text for a Grade 11 native English-speaking person.
Original: Supporters argue that the barrier is necessary to protect Israeli civilians from Palestinian terrorism , including the suicide bombing attacks that increased significantly during the Second Intifada ; There has been a reduced number of incidents of suicide bombings since the construction of the barrier .
Simplified: There are many arguments about the barrier . People who want the barrier say it is needed to protect Israeli civilians from Palestinian terrorism , including suicide bombing attacks .