Ah yes, I forgot to add yesterday: because of the 'constellation' described above, it was actually so that Hussein Badr ad-Din al-Houthi was executed by the CO of the 312 Brigade - one of Ali Mohsen's units.

Thus, the Houthis didn't blame Saleh for this: they blamed Saleh for not negotiating with them 'while there was still time', which was back in 2004-2006.

But, when they overrun the HQ of the 312 Brigade in the course of their advance on Sana'a, back in September 2014, they caught the CO of that unit - and shot him on the spot.

Thus, I doubt 'the Houthis executed Saleh to avenge killing of their founder' - as cited in that article. They avenged that death three years ago.