To make explicit the analogy to modern politics, you should be happy when your opponent wins an election.
No, this is not true.
What it actually shows is that you have a reason to be happy when your opponent wins an election, but it does not imply that this reason outweighs the other reasons to be unhappy about it. You cannot conclude from “a reason to be happy” that you should then overall be happy.
Also, it depends on why your opponent won the election. People can win elections for reasons other than rising tides. For instance, if your opponent wins an election because he got away with lying, you should be unhappy, even if lying is legal.
No, this is not true.
What it actually shows is that you have a reason to be happy when your opponent wins an election, but it does not imply that this reason outweighs the other reasons to be unhappy about it. You cannot conclude from “a reason to be happy” that you should then overall be happy.
Also, it depends on why your opponent won the election. People can win elections for reasons other than rising tides. For instance, if your opponent wins an election because he got away with lying, you should be unhappy, even if lying is legal.
Yes, this only applies when there is a sentiment bubbling up that will grow.