If he did murder Speicher as some kind of "you do this and you're in" type of thing. I bet he is nervous now with annos talking about it.
Brilliant strategy.
Blame Jews 24/7 so the average sheep sees it while researching or just stumbles on it.
When the do start waking up and see all the cabal among the jews, you have already programed them to stop looking any further and simply blame muh jews.
Now they fell in the trap you can marginalize them and label them antisemitic and shut them down.