The Church is not telling you who to vote for. But there are certain positions that are incompatible with being a Catholic, and support for abortion is one of them. It would perhaps be one thing if Rudy would keep his mouth shut and just go along with party platform; but he has always been a big and vocal supporter of abortion (well, since his Donna Hanover days) and I think the point of the editorial is well made. If we Catholics tell the GOP that it doesn't matter and that we don't really care what our church teaches anyway, then I can guarantee you that exactly what the editorial says will come to pass: the GOP will become officially pro-abortion, thanks to folks like you.
As the editorial says, there's nothing unreasonable about the anti-abortion position. Furthermore, it's always gotten us votes. Drop it and what are you left with? Democrat Party lite.