Apart from the fact that it is discriminatory and non-democratic they cannot recognise a religiously defined Israel because that discriminates against non-Jews. Allowing Israel to be like Saudi Arabia may be backward for Israel but it immediately disenfranchises non-Jewish Israelis, of which there are millions and Palestinians who were forced out of their homes when Palestine was colonised to create Israel. There would be no flotillas if Israel ended the occupation and neogitated legitimate borders for itself.
Shots fired from northern Gaza at IDF forces stationed at border, no casualties (Haaretz)
from the article: Activists: Gaza flotilla will set sail next week