One goal is probably to show average Russians that the war is not just something which happens somewhere else in the world - a side-note on the news, no need to bother about.
The question why people who do not agree with the government should also pay the price for a war started by their government/country is not specific to this war.
The question why people who do not agree with the government should also pay the price for a war started by their government/country is not specific to this war.