EVERY source is "influenced," which is why it's so important to diversify your sources to get a better picture of the full story. Wikipedia may not be perfect, but it does a hell of a job trying to be as impartial as is possible when humans are involved. If you still don't trust them, that's fine - but don't trust your preferred side to give you the full story, either - or not try to slant the story towards propaganda to take advantage of confirmation bias for their own purposes.