The most dangerous political slogans are the ones that claim to hold the absolute truth. Perhaps this could be understandable in some cases, because the first law of politics is based on interests, not morals or ideals.
On one hand, Doha supports extremist groups fighting Bashar al-Assad’s regime and its Iranian ally on Syrian territory, and on the other hand, it stands with Iran in its occupation of Syrian territory and legitimizes its presence; hence supporting two conflicting parties at the same time.
The new round of strict US economic sanctions will go into effect against Tehran on Monday. They are not the first to ever be slapped against Iran. In fact, it has a long history of all sorts of sanctions.