Which Western leader advocated ethnic cleansing?

Guess who said this in 1989:

Israel should have taken advantage of the suppression of the demonstrations in China [Tiananmen Square], when the world’s attention was focussed on what was happening in that country, to carry out mass expulsions among the Arabs of the Territories. However, to my regret, they did not support that policy that I proposed, and which I still propose should be implemented.