Shocked Russians turned out by the thousands Thursday to decry their country’s invasion of Ukraine as emotional calls for protests grew on social media. Some 1,702 people in 53 Russian cities were detained, at least 940 of them in Moscow. Hundreds of posts came pouring in condemning Moscow’s most aggressive actions since the 1979 Soviet invasion of Afghanistan. Vladimir Putin called the attack a “special military operation” to protect civilians in eastern Ukraine from “genocide” — a false claim the US had predicted would be a pretext for invasion, and which many Russians roundly rejected. Taty…