The Muslim Brotherhood is a massive region-wide organization complete with political parties, armed wings, and of course immense state-sponsorship including from the United States, Western Europe, and the West's partners particularly in the Persian Gulf and Turkey.
If the Muslim Brotherhood lacks "any sort of capability to organize on such a scale" inside of Egypt, who has more capability to do so?
The DW article suggests there may be a rift within Egypt's ruling elite but no evidence, names or even a theory is put forth as to who among Egypt's elite might be involved or why.
Conversely, the substantial evidence indicating US interference and the Muslim Brotherhood's role together with the fact the US and its allies have not only repeatedly destabilized other nations around the globe through similar tactics but have destabilized Egypt itself in 2011 through similar tactics points the finger squarely at Washington and its allies.
An "Arab Spring" Reboot
US-funded protests overthrew the Egyptian government led by Hosni Mubarak in 2011.
US-Turkish-Saudi nominee Mohamed Morsi rose to power and immediately set out to transform the large North African nation into an obedient servant of Western interests.
This included severing ties between Egypt and the Syrian government of President Bashar al-Assad while arming, funding, and recruiting militants being funneled onto the battlefield within Syria itself.
A 2013 Voice of America article titled, "Morsi Cuts Egypt's Syria Ties, Backs No-fly Zone," would report:
Egyptian President Mohamed Morsi said he had cut all diplomatic ties with Damascus on Saturday and backed a no-fly zone over Syria, pitching the most populous Arab state more firmly against President Bashar al-Assad.
Addressing a rally called by Sunni Muslim clerics in Cairo, the Sunni Islamist head of state also warned Assad's ally, the Iranian-backed Lebanese Shi'ite militia Hezbollah, to pull back from fighting in Syria.
Later in 2013, Egypt's powerful military regrouped, managing to oust Morsi from office.
The subsequent government headed by General Abdel Fattah el-Sisi incarcerated Morsi, restored ties with Syria, and began steering Egypt back toward a more neutral foreign policy.
Commentators have cited Egypt's role in the US-led war in Yemen as evidence that el-Sisi's government also serves US interests but it should be noted that Egypt's commitments were symbolic, short-lived, and a result of paying back Persian Gulf monarchies who financially bailed out Egypt's flagging economy in the wake of 2011's instability.
For a nation like Egypt whose foreign policy, economic ties, and relations have straddled East and West for decades, "choosing sides" is not a simple matter.
Egypt's fragile economic, social, and political balance has been repeatedly targeted by Western interests both directly and through militant proxies armed and backed by Persian Gulf states following attempts by Cairo to rebuild ties with Russia or to build closer ties with China.