What's a wedge issue for one side isn't for the other.
To dream up an example here, you'd need to think of a wedge for pro-lifers to support abortion, for some it might "in the case of rape or incest" since for some that sounds reasonable usage. I think what was used in the early abortion battle of Roe v. Wade was the red herring of back alley, clothes hanger abortions - even today the left says "making abortion rare and SAFE".
So wedges are somewhat of an art form. You have to also be careful about what's called cross-pressure. For example if you talk about limits on abortion, like rape and incest, as a wedge against pro-lifers, you risk sounding wrong on the issue to pro-aborts. Ideally you control who gets what message - that's why direct mail and good lists are so valuable. But in today's media, it's hard to maintain message control, what is communicated to one target audience can get picked up and broadcast to everyone, and backfire on you.
Let’s remember what a wedge issue actually is. Then maybe we have a chance of using it effectively.
And avoid its use against us - which is the subject of this thread.
In politics, a wedge issue is something you use against your opponent and try to keep them from using against you.
So you meant to say ". . . and you try to keep them from using other wedge issues against you."
I still fail to see how a big moral issue is a wedge issue. One of the examples given was abortion. What would the larger issue be? Women's "rights"? I don't think so.
Or with God in the public square? What would the larger issue be? God?
Racial preferences? What would the larger issue be here? Disobedience to the rulings of the Supreme Court?
The only one that makes any sense is gay marriage, which could be a wedge issue to stop the headlong rush to gays taking over everything they feel like taking over, the whole gay agenda.
The issues mentioned in the article are big moral issues. They are not wedges. They are not micro-targets. Maybe we can think of a way to use wedges on these issues.
The Left is indeed trying to use these large issues against us, to divide the libertarians from the social conservatives. In that much we agree.