Not good news for the Liberals, but keep in mind that's what early polls on hot-button issues often show.  Here are two Canadian examples, one historical and one recent:

Pierre Trudeau's declaration of the War Measures Act received overwhelming support in October of 1970.  Tommy Douglas' assessment that it was "using a sledgehammer to crack a peanut" didn't get much support. But once Canadians had time to consider it, a sizeable number started to think Douglas had a point.  Two years later, the Liberals fell from an overwhelming majority to a minority government with a 2-seat lead.

In March 2015, the Harper government took a famous poll showing 82% against allowing a niqab to be worn during citizenship ceremonies.  They held onto it and released the poll during the election campaign.  But Canadians had already started to think differently when they understood what the issue was really about. As a result, the issue may have helped Conservatives lose the election.