A recent study by researchers at the University of Padua and the Max Planck Institute for Demographic Research (MPIDR) has revealed that political differences between partners can significantly increase the risk of separation. Using long-term data from UK couples, the researchers found that those with different party preferences were substantially more likely to separate than those with the same political beliefs. The risk is particularly high when there are differences of opinion on Brexit.
In your original comment, it seemed like you were questioning why the study was funded, then compared it to another obvious cause-effect about kicking a dog. Did I misunderstand?
The conclusion might have confirmed your personal hypothesis, but we don’t assume that any conclusion “naturally follows” a hypothesis without measuring it.
The way you phrased it is a tautology, but the study didn’t measure antagonism. It measured whether couples broke up or not.
The research subject as quoted is a tautology, people separate because they have irreconcilable differences, opposing political views is an irreconcilable difference so the conclusion of the research is that couples with irreconcilable differences are more likely to suffer from the problems associated with irreconcilable differences.