As usual with a Khandro post it is useful to check the story yourself to make sure they are be being presented honestly or not.
And the answer is mostly 'not'. True the EU has supported the Spanish Government, but the quote by Mr Timmermans was not in some edict by the EU, but was in a free debate (although slightly fixed) in the Eiropean Parliament, and many different views to Catalonia were expressed.
Timmermans did say the police action was proportionate, but he prefaced his comment, the full quote is here...
// “Let me be clear: Violence does not solve anything in politics. It is never an answer, never a solution. And it can never be used as a weapon or instrument,” he said.
“None of us want to see violence in our societies,” Timmermans went on. “However it is a duty for any government to uphold the law, and this sometimes does require the proportionate use of force.” //
In the debate, Timmermans was directly contradicted...
// Patrick Le Hyarric, a French MEP from the far-left GUE group, criticized EU countries who “turn a blind eye” on Catalonia while “the nation is ripping itself apart.”
“The EU must condemn the violation of the fundamental rights,” Le Hyarric said. “This crisis is not unfamiliar to us. We can’t accept politics based on violence in the EU.” //
http://www.politico.eu/article/brussels-defends-use-of-proportionate-force-in-catalonia/
So 'proportionate' is one mans' opinion rather than an official EU proclamation. But the EU is against any disintegration of ANY member state, including when Scotland voted on leaving the UK.