Your bias is showing and you're skirting into alt-fact territory. That run of Keynesian fiscal policy helped see us through a massive global recession largely unscathed. 

Your favoured party would have done the same, if not on an even larger scale. Keep in mind that they're digging a fiscal hole right now and the economy is doing fine. This is a weak policy that does not sit well with plenty of Canadians who are constant net contributors to the economy. Over time this issue, if not corrected, will become an electoral gold mine for the conservatives. 
 
Moderate conservatives will not be abandoning the party en masse.  Scheer et al. will represent a swath of Canadians unimpressed with the current government.