The question is not as daft as some would like to make out, indeed we see the usual 'ban the question' rather than debate it, athough I do think it could be worded better.
Should they be jailed Well yes if found guilty of aiding and abetting.
Should they be investigated by the police? Again yes, if only to stop false accusations if they are innocent.
Should they be investigated by SS? Certainly should, given what has been going on (and not just the bombing aspect) it rather looks like they are a little too old if nothing else.