Original sentence: Many of these advocates suspect that the whole "homeland" issue was concocted as an excuse to justify the total destruction of Israel, due to virulent and intractable anti-Semitism.Other advocates maintain, however, that since 78% of the British Mandate of Palestine went to Jordan, most of the "Palestinian homeland" is in friendly Arab hands, so there is no need to seek a "new homeland".Some advocates assert (1) that accepting this definition implies that a Palestinian homeland has already existed, (2) that most of that land was conquered by the Jewish state of Israel, and (3) that the Palestinians of today are therefore forced to seek a new homeland
Edited sentence: Some advocates assert that accepting this definition implies that a Palestinian homeland has already existed, and that most of that land was conquered by the Jewish state of Israel, so that the Palestinians of today are forced to seek a new homeland