While I doubt many intended to engage in violent protests, even the admission of four is a gesture. You seem to assume all nations are required to allow people to enter and protest. This is not the case. If Israel choses to allow some, or especially many, into the country with the promise to not engage in violent protest (which is illegal everywhere I have ever heard of) then it will have done as much as possible to reduce the bad publicity as is possible.
Donald Trump: Israeli settlement construction in West Bank should 'keep going' (Haaretz)
from the article: Israel to deport pro-Palestinian 'fly-in' activists within 48 hours
Let them come. Let them come in droves. Let artists like Bruce Springsteen and Steve Van Zandt bring Israelis who need to hear it, a message of social justice and freedom for Palestinians.18:17 03.05.16 | 3 comments