It is not disingenuous at all.
For many decades the Palestinian leadership has rejected a two state solution. As a result there has beeen continued acrimony and increasing radicalisation; suicide bombings by Palestinian extremists killing many hundreds of Israelis including children; hundreds of rockets fired on a daily basis into Israel with the purpose of terrorising the population; and conflict and repression on the West Bank; now with radicalised Israeli settlers venting their rage.
A one state solution is not really a realistic proposal. Israel was founded with purpose of having a Jewish focus fro a long persecuted Jewish people. Israel is the product of vision, hard work and commitment and encodes western type liberal values whilst accommodating religious Jews.
Those who identify as Palestinian need their own state - one which would reflect their values and culture - just as much as the Jewish state reflects theirs.