Any sanctions that cut off the westward flow of Russian gas need to be well-thought-through, otherwise those laying the sanctions might suffer more than those sanctioned, according to multiple German business and labour leaders. The question of whether to lay an embargo on Russian fuel is tying Europe up into knots. On the one hand, few want to buy Russian oil and gas and funnel payments to a country that has attacked its neighbour, Ukraine. But, on the other hand, most of Europe is unsure how it will heat its homes and power its economy without Russian fuel, which makes up a significant porti…