Well, no. That's not what people who are against gay marriage are trying to stop.
Those are all different issues, and you'll find different percentages of people for and against each of them. Lowest against the deathbed issue, highest on the child custody issue, for example. Then the concept of redefining the term "marriage", which is yet another different issue.
Conflating all these issues is not helpful in the discussion. People's feelings on these topics are complex, and you really have to talk about it with that complexity to have any meaningful insight.
Those are all different issues, and you'll find different percentages of people for and against each of them. Lowest against the deathbed issue, highest on the child custody issue, for example. Then the concept of redefining the term "marriage", which is yet another different issue.
Conflating all these issues is not helpful in the discussion. People's feelings on these topics are complex, and you really have to talk about it with that complexity to have any meaningful insight.