Apparently, by nationalism, and especially Ukrainian nationalism, you understand something very bad. To hang up unclear labels, let's first figure out what they mean.
By nationalism I mean those people in Ukraine who are very aggressive towards Russian speaking Ukrainians and those who have been jumping at the time of Maidan and shouting very loudly the following words: "Those who do not jump with us, are Muscovites. A Muscovite must be hanged"
These are the people who customarily torture and kill those Ukrainians who have a good attitude toward Russia.