Answer is nope, not to Germany or EU because you only get to do it once and they stop buying. Germany bought $20 billion and NL bought $30 billion in Oil and Gas in 2017, assume that gets to $70 in a couple of years and thats 15-20 % of Russian exports. Germany and NL can buy elsewhere at increased cost and then not pay Russia for breach of agreement. Mutually agreed destruction of both economies
Well, at least you answered, that’s more than others do. Putin would be foolish not to weaponize NG. If he can achieve his goals by coercion rather than outright use of force and associated consequences, I have every reason to believe he would.