It's required to be effective. The press can't credibly use it as a smear and expect results unless there's a large and sustained belief that it's actually true, a belief that's fostered by both the cynical actors and the actual believers simultaneously, making them indistinct from each other. In other words, Zionists wanted their political opponents removed, they've made an atmosphere where they could be removed, and then they were removed. And once again, the individual feelings of the people pushing Zionism do not at all enter the equation. Whether they're pushing Zionism because they think Jesus will come back, or if they want to start a farm in Palestire, or they just want their political rivals to lose, it doesn't matter. Zionists created the pressure, saying that the purge was Zionist directed is just a statement of fact.