I wouldn't be surprised if those accounts spread From the River to the Sea messages, which is basically calling for a genocide

If that were the concern they would swiftly ban the accounts of the Likud party, which has used the slogan in genocidal contexts as well (and continues to spout such rhetoric, along with its coalition partners). And in fact, the origins of the phrase can be traced back to Zionist literature from the 1920s. From Wikipedia:

   The 1977 election manifesto of the right-wing Israeli Likud party said: "Between the sea and the Jordan there will only be Israeli sovereignty." ... The Israeli-American historian Omer Bartov notes that Zionist usage of such language predates the establishment of the State of Israel in 1948 and began with the Revisionist movement of Zionism led by Vladimir Jabotinski, which spoke of establishing a Jewish state in all of Palestine and had a song which includes: "The Jordan has two banks; this one is ours, and the other one too," suggesting a Jewish state extending even beyond the Jordan River.

In any case -- current usage of the slogan from the pro-Palestine activist side is not intrinsically genocidal. Some basically do mean it that way. But most (at least those I talk to) do not. In their view it just means they want a Palestine that is "democratic, pluralistic, free from apartheid and other forms of oppression".

And there's certainly nothing untoward about wanting that.