It is an irrational thought if he and Durant were supposed to be the co leaders of this team and adding harden who bought in UP UNTIL the vaccination status issue. Kyrie is by definition irrational given the circumstancesThere's nothing wrong with asking him if he feels guilty. And all things considered, aside from some poor word choices his response was kinda benign .
His decision to remain unvaccinated is a choice that has a direct influence on the performance of the team in a negative way. It's a perfectly fair question. And he may legitimately feel no guilt about it and feel that the team should be able to adjust in his absence. Which true or not, isn't an irrational thought.