I know it’s counter Intuitive but bear with me.

In itself the notion of euro-“skepticism” cannot be rooted in class struggle. To be skeptical you have to believe there is something supposedly useful about it : conservatives are skeptical because they are on the side of the bourgeoisie that created the EU, but now they have doubts about whether or not this structure is appropriate for their bourgeois goals.

If you are Marxist there is no skepticism to have. You just know the EU is a bourgeois free market structure. If you are anti-imperialist then you are for the overthrow of the current EU system to replace it with a proletarian EU. If not possible then you want to see it lose its power because you want the third world free from this bullshit monetary policy and threat of aggression.

This is why Brexit was a disaster economically, the wing of the bourgeoisie that grew skeptical of the usefulness of the EU for their own goals thought they could do without, and they were wrong. This is bourgeois infighting, where the liberal bourgeois were right this time. The EU is objectively the best thing to enforce the dictatorship of the bourgeoisie.

I think this analysis allow us to understand why we seem to be on board with conservatives on a topic where they are factually incorrect. They are wrong about how to best maintain capitalist hegemony, liberals are right on this subject, but we Marxists are opposed to capitalist hegemony so we simply rejoice at their division and to see them going into the wrong direction