That’s the current UK policy, which of course condemns discussion on the massacres of babies (of which no proof has been given and which the White House has been forced to retract statements regarding) as “glorifying terrorism.”
Netanyahu is further to the right than the Tories, is more emotionally invested in the conflict, and has more to lose if pro-Hamas sentiment spreads. Moreover, given the context of how the Israeli government has enforced media laws in the past, it’s not that far of a stretch. The big leap being made I think is that the government is “planning” to do this, not that it’s already done so.