In the context of Brexit and rise of right-wing parties, EU countries are adopting sanctions in order to keep the unity. Europe needs an external enemy and uses Russia for this role.
Europe does not care about the Kerch confrontation, it needs to promote Berlin’s and Paris’ agenda for EU integration.
Since March 2014, the EU has progressively imposed restrictive measures against Russia. The measures were adopted in response to the illegal annexation of Crimea and the deliberate destabilisation of Ukraine.
On 25 November 2018 border patrol boats belonging to Russia’s FSB security service seized two small Ukrainian armoured artillery vessels and their crews after shooting at them, wounding several Ukrainian servicemen. Russia argued that they were in Russian waters.
However a bilateral treaty between Russia and Ukraine, signed in 2003 and ratified by Russia in 2004, governs the use of the Kerch strait and the Sea of Azov, which in the treaty is considered to be the “internal waters” of both Russia and Ukraine.