Let us be diplomatic about this...
Why aren't you crossing the floor?
Opposing a civilized idea like the long gun registry is NOT a Liberal/liberal value. If you think it is, you are not a liberal (or Liberal).
If you "choose" to support the Conservative Bill, here's what you can count on from real Liberals:
1) We will not attend your events
2) We will not attend events that you are attending (we'll be starting a Facebook group, etc., to encourage boycotting said events)
3) We will ensure someone runs against you in your riding
4) We will ensure a mailing campaign begins to oppose every statement you make in the house.
Perhaps that's an extreme measure. We're not really that extreme. But, face it. If you're "for" killing the registry (and dozens of Canadians in the process), because of the whims of your constituency, then you may as well follow all those "whims": right to choose, same sex marriage, etc. We know your riding probably opposes those liberal ideals as well.
Bottom line: You're "liberal's of convenience"/opportunists...
Lifelong "true" Liberals.
ps: That's (above) what He thinks of you too.