The simple answer is there is an inconsistency in our laws at the moment.
Under the Immigration and Refugee Protection Act, someone convicted of a crime or someone who committed an act that would have been a crime in Canada is inadmissible to Canada as a visitor. At the moment, our Citizenship Act does not make that person ineligible for citizenship for having committed the same crime. That's an inconsistency, and we're cleaning that up. It stands to reason that those who have met all the requirements of citizenship, who have the skills, the language, the competencies, the education to come here should meet the basic criteria of not having a criminal record as determined by a jurisdiction that we respect in a fellow democracy with the rule of law. That, I think, is common sense to Canadians. In the case that you mentioned, of a war crime, we have a particular responsibility both for visitors and for those applying for citizenship to screen people for just that.
As we start to have permanent residents and citizens coming from all parts of the world, often regions or countries that have had terrible conflict where atrocities or war crimes were committed, we have a responsibility to the Canadian people under our laws to make sure that the perpetrators of those crimes do not become our immigrants or our citizens.