Since his first meeting with Kremlin leaders in Moscow last July, President Barack Obama has established a dialogue with Russia over some critical issues — Iran, Afghanistan, nuclear arms reduction, missile defense — and all of these have yielded progress, even if meager and tentative. But when it came time last week for an unprecedented meeting — involving Russian and American officials, along with human-rights advocates — to discuss the issue of human rights, the dialogue with the Kremlin hit a wall. The Russian side came away pleased that there had been no criticism from the Americans, none of the condescension they remember from the Bush years. The American side, for its part, seemed content to have raised these issues, showing that they have not forgotten them in their eagerness to be friends again. Still, for the rights activists who were at the the table — a presence that was historic — the whole process seemed little more than unproductive political theater.