I don't think it was so much disrespect as it was disorganization of the CDS schedule. Ramsay Withers passed away was circumstances beyond the control of CDS.
But he passed away Dec 24th 2014. His funeral was Jan 10, 2015. So even if the CDS has no control over some events to attend, namely the funeral, there certainly was enough time, at least in my opinion, for CDS to contact the Calgary Highlanders for a re-schedule of the parade. They could have been contacted to have the date moved.
Yes it was a case of two events falling on the same date. But it wasn't a case that one of those events happened at the last minute, they had time IMHO to reschedule the parade so the CDS could attend both the funeral and the parade.
But I emphasize I see it more disorganization, not disrespect
Anyhow a civie's, and former Reservist's point of view for what it's worth
Tom