Notice how similar these tactics are to what the Libs do here in the US. They identify an enemy — Jews in the case of these Islamic zealots and “extreme Conservatives” and “religious Christians” in the case of Libs — and turn EVERYONE who they disagree with or who is in their way into the enemy no matter how silly the characterization seems on its face. The enemy has to be a Jew because Jews are the enemy. Similary, the enemy in the US has to be an evil Conservative or Christian zealot because that is who the enemy is in the US. Its how totalitarians operate.
Germans used the same shtick indeed during Hitler’s heydays. If you traded with jews, you were a jew.