The Meiri and the attitude towards the Gentiles

Following the majority is the source of the law of following the majority. But when I am not in doubt, I do not have to follow the majority. Like the joke about Rabbi Eybshitz and the priest who asked him why the Jews should not follow the Christians who are the majority. Therefore, if you believe as Meiri does, then you should act like him. And if not, then no. Only if you are in doubt is there room for argument to follow the majority (and even there it is not clear, because the poskim wrote that when the majority did not discuss together, there is no law to deviate from the majority).