Hypocrisy in politics is nothing new and certainly not something someone would resign over (he'll have his own rationale about some trivial detail.)
As for turfing him out right away, he just led the Conservatives to crack 40% of the popular vote, something they hadn't done for 30+ years (Mulroney in '88 was the last one) and it took almost historic defections from the NDP/Greens to keep them out of power.
If things don't get better rapidly (economy, housing, both of which are long term challenges unlikely to be solved in a single Parliament) I'd say Poilievre has a pretty good shot next time as the defectors return to their parties and the Right continues to rise among young voters etc.
I've been wondering about this too, thought I was just out of the loop but nothing I can find from a reputable source has really made me think he's a right winger.
Like, maybe we can't say for sure but to insist he's actually extremely far right seems like a wild leap.