Again I will disagree with this statement that FIFA should not have allowed a Muslim country to host the world cup. We need to understand that there are different religions around the world and everyone should respect each other religion. This is no excuse to deny the opportunity to host a word only on the basis of a certain religion.
Also, please remember that football is a global sport that is played in Muslim and non muslim countries. If Muslim countries are denied to host it, it will only encourage discrimination against them which is not right for the sport itself.
The bad decision was to allow a country which clearly bribed their way to win the rights to host the world cup to keep that right, as it is obvious that since they were willing to do such a thing then they will no doubt change the rules once they had the rights to host the world cup, a thing they did and which left FIFA as nothing more but a joke, so I think from now on FIFA will be way more careful about the selection to host the cup as I doubt they will want for such a thing to repeat once again.
It's not about allowing a Muslim country to host the world cup, the most important thing is about the country's rules because even some Musil country they have rules everyone should respect, and doesn't matter if they are hosting a world cup or not whether in other Muslim countries, they will expect the visitors from other countries to do not drink alcohol and they take it hard for them.