Winner masks his racism towards Arabs by pretending to be naive. He claims that the only way of solving Israeli-Palestinian problem is, well, giving all the Palestine (and Golan Heights, and Shebaa) to israel, and none other than destroying Palestinians altogether, by expulsing them and making them assimilate. That is not only one-sided, but also short-sighted and clearly dumb. I won't discuss the first part, why is it unfair towards Palestinians etc, because it's obvious.
What may not seem obvious is why it won't solve anything.
First, it will not solve problem, but export it outside Israel's borders. People wanting revenge on Israel, people wanted it to perish won't disappear, instead they will grow tenfold, among palestinian and other arab and muslim populations. It will increase the pressure on neighbour lands not to sign deals with Israel. It will destabilise them internally. It will make open borders between Israel and arab countries completely impossible for a century or more. It will make Israel lose any support it has not among western nations, apart perhaps for people of Winner's kind.