I think it's unfortunate that this issue's use as a political weapon means that politicians are probably looking more at the polls (or in some cases a flipped coin, I'm sure) than the actual thing they are voting on.
Unfortunately your point here is not exclusive to the registry but across almost every issue being debated in politics today. It is difficult to find anyone willing to look at the actual issues beyond the required position they need to take and this is true of all parties now but I beleive the fault of one. The Conservative party's legacy to date may be more in the polarization and raising partisanship from an ever-present consideration to the exclusive consideration behind every move. The cons have learned to sow and harvest division in other parties as a matter of political tactics rather than accident. The damage to responsible government here is very deep.