I have attended many NDP meetings over the years. At first, Barry was taken as a voice for a group with the ONDP. For at least the last five years, people who tell me they are on the left of the NDP have groaned as Barry approached a microphone and told me afterward that he had just done more harm to the cause he claims to promote than benefit the cause. From having seen him in action myself (if only Barry could be seen from afar by me) and from the reaction of colleagues who otherwise all agree that the ONDP should move further to the left, Barry's words do not match his actions in terms of have the effect of promoting the left within the NDP. That is only my opinion, and I am sure that others have different opinions. But I do know that I am not the only person with this opinion.
I use to assume that Weisleder was being paid by CSIS and its predecessor to infiltrate the trots, report on their activities, and do a little discreet disruptive adventurism when the chance arose. But he's been at it far too long. CSIS does not have an unlimited budget to spend on such a bit player. So I have concluded he is exactly what he appears to be, which is really not worth a lot of further discussion.