> they don't want cheap gas

You don't strengthen an enemy (Russia) by buying their products. Defence is more important.

> as well as shutting down reactors

A German problem, not a wider European one.

The solution is to accelerate the transition into electric vehicles (including HGVs etc.), renewable energy, and nuclear. Oil is obviously still needed for materials production, air fuel, and so on, but extricating ourselves from situations where oil is becoming optional as fast as possible is the best course, not continuing to buy cheap gas from an aggressive neighbour that's fucking your elections and invading its neighbour.