When someone with an agenda makes a claim, the best thing to do is ignore it because we know it was made with genuine malicious intentions.
There are a lot of problems that the previous government have left this country that need to be dealt with, fighting over historical crimes like this is a distraction, and I suspect it was done to make Labour look weak. They just need to ignore the furore and get on with healing the country and people will realise that HATE DOES NOT WIN.