Have any pro-Palestinians (specifically the anti-Israel ones) actually been to Israel or talked to an Israeli?
Travel can change a person's thoughts and worldview, and traveling to Israel is no different. The same happens when you talk to a person from a foreign country and realize that they're not that different from you. Israelis, like everyone who lives in a liberal democracy, have varying opinions on a variety of topics and can share them without fear. You may discover that the place you thought was an apartheid regime isn't as bad as you were told or was a total lie. You may find the people just want to be safe and not attack other countries nor do they support their leader with a hive mind behavior.