This [Douma chemical attack] was a provocation, a typical pretext for war. World War II began that way, when SS troops in Poland in 1939 acted as if they took lessons from the British-sponsored White Helmets, which was then used by Nazi propaganda. The fake attack on a German radio station in the town of Gleiwitz in August 1939 became the pretext for the Nazi invasion of Poland at the start of World War II where millions of people got killed. What is the difference between that and the Western methods in Syria now?
Repeating recurring pro-Kremlin disinformation on chemical attack in Douma, Syria and the White Helmets. euvsdisinfo.eu/disinformation-cases/?text=douma&disinfo_issue=&date=,
The Nazi German attack in Gleiwitz 1939 has nothing to do with the Douma chemical attack. www.telegraph.co.uk/history/world-war-two/6106566/World-War-IIs-first-victim.html, https://www.britannica.com/event/German-Soviet-Nonaggression-Pact,
On 7 April 2018, a high number of civilians were killed in the besieged Syrian city of Douma, with evidence pointing towards another chemical attack by the regime, according to the EU.
See also Bellingcat's open source survey on the suspected chemical attack: https://www.bellingcat.com/news/mena/2018/04/11/open-source-survey-alleged-chemical-attacks-douma-7th-april-2018/
On April 10 Russia vetoed a U.S.-drafted U.N. Security Council resolution that would have created a new inquiry to ascertain responsibility for chemical weapons attacks in Syria.
UN-OPCW Joint Investigative Mechanism found Syria’s Government responsible for last year’s attack in Khan Shaykhun.
In September 2017, the UN Commission of Inquiry on the Syrian Arab Republic summarized 33 separate incidents where it had found use of chemical weapons. Since then there have been several additional suspected chemical attacks. Between March 2013 and March 2017, the Commission documented 25 incidents of chemical weapons use in the Syrian Arab Republic, of which 20 were proven to have been perpetrated by government forces and used primarily against civilians.