A mentally unstable woman Gyulcherkhra Bobokulova killed 4-year old Russian girl in Moscow on February 29th, 2016. In police she said that she killed the child in revenge for the children killed by Putin in Syria.
By starting war in Syria, Putin wanted to come out of political isolation in which he was placed for his disgraceful war in eastern Ukraine and annexation of Crimea. Yet, his plans failed again, and instead of gaining political benefits he has put the whole Russian population under the threat of terrorist attacks by Islamic terrorists. Another terrorist attack took place on 31 October 2015 when Russian airplane was brought down by bomb over Egypt's Sinai killing 224 people, 219 of whom were Russians (https://en.wikipedia.org/wiki/Metrojet_Flight_9268).