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Kommersant is a reputable Russian newspaper, and you have no reason not to trust it, unless you have some proplem with the Russian media. It does not matter that members ""believe"". That's their personal opinion, and opinions should not be stated as a fact (basic rule of neutrality)
Wikipedia:Neutral_point_of_view#Explanation_of_the_neutral_point_of_view
Avoid stating opinions as facts. Usually, articles will contain information about the significant opinions that have been expressed about their subjects. However, these opinions should not be stated in Wikipedia's voice. Rather, they should be attributed in the text to particular sources, or where justified, described as widespread views, etc. For example, an article should not state that ""genocide is an evil action"", but it may state that ""genocide has been described by John X as the epitome of human evil.""
Avoid stating seriously contested assertions as facts. If different reliable sources make conflicting assertions about a matter, treat these assertions as opinions rather than facts, and do not present them as direct statements."