The Houthi threat has not been given due attention in Western capitals. They are not proscribed as a terrorist group by the US State Department, NATO, or the EU. This means it is perfectly legal to support, or even fundraise for them.
Speaking in the UK Parliament this afternoon, UK Prime Minister Theresa May confirmed that she aims to revoke visas of all suspects in the murder of journalist Jamal Khashoggi and added that she will be speaking to Saudi Arabia's King Salman later today.
An abandoned diplomatic vehicle belonging to the Saudi consulate in Istanbul has been found by Turkish authorities. The vehicle is a black Mercedes sedan that matches one seen in security camera footage outside the consulate building around the time that Khashoggi was murdered.