As sharp as Hitler's analysis was, it still needs to be modified a little for today's political environment and for holocaust debate.
The Zionists in Hitler's day were politically savvy and powerful, but they didn't have the power of the state behind them. So, in the debates with Hitler and the nationalists, their goal was to win the debate to increase their influence. So, they would only resort to stupidity when their rational arguments failed to carry the day. That is, feigned stupidity was employed defensively, as a last resort when rational arguments failed.
Today, the Zionist resorts to stupidity not when he fails to best his opponent in rational debate, but when he fails to have his opponent arrested.
Today, the Zionists truly believe that anyone who opposes them in debate should be arrested and thrown in jail. And, in Israel, and in many European states, and in Canada and Australia, if you oppose the Zionists in holocaust debate you will be arrested and thrown in jail. Thus in many parts of the world the Zionists do have the power of the state behind him.
In the rare spots on the internet where anti-Zionist arguments are not banned, the goal of the Zionists is not to win debates, as the Zionist does not feel he/she should be obliged to debate at all, and feels offended that anti-Zionist sentiments even see the light of day. Thus, the goal of the Zionists today is not to win debates but to end them. This allows for a much wider range of strategies.
Hitler claimed that Marxist Jews pretended to be stupid in debate, but he was talking about face to face debates, with no access to outside information, so Hitler could reference a current or historical event, and the Marxist Jew could claim to be unfamiliar with it, and hence invalidate Hitler's point. This is passive stupidity. But, passive stupidity doesn't fly on the internet, as a link can always be provided to counter it. So, what we see from the Zionists on this forum is aggressive stupidity, which fits with the general tone of their comments, and becomes not a defensive weapon to avoid losing a debate, but an offensive weapon not to win the debate but to end it, to trash it, it's like, sad to say, ******** on the living room floor, there is no counter for it. Thus the Zionist tries to accomplishe his objective, which is not to win the debate but to rout the opponent and end the debate.
Today, the Zionists gets to employ feigned stupidity, insults, name calling ('anti-semite', 'Nazi' are favorites), personal attacks, scatology, and evasion, not as defensive tactics but as an offensive strategy, because the goal is to end the debate and all these methods serve that end. The more idiotic and offensive the comments, the better. They don't 'resort' to these tactics, they employ them continuously as preferred methods of 'debate'.