No, Putin is not a nice guy. People who cross him tend to end up murdered.
Via Daily Caller:
A former Russian member of parliament who fled to Ukraine after mounting heavy criticism against President Vladimir Putin was shot dead in Kiev on Thursday.
Denis Voronenkov, a former Communist member in the lower house of Russian parliament, was fatally shot by an unidentified gunman at the entrance of a high-end hotel in the Ukrainian capital, authorities confirmed, according to the Guardian.
Voronenkov moved to Ukraine in late 2016 because he said Kremlin security agencies were pursuing him. He renounced his Russian citizenship and was soon after granted Ukrainian citizenship.