Here is excellent article that explains hidden reasons behind wide spread phenomenon where people believe certain things or have certain views and you cannot change those using rational arguments:

https://meltingasphalt.com/crony-beliefs/

Spoiler: It is primarily about hidden self interest. But people will never admit it and will argue using any information they can find to support their goal. So it is pointless to attack with logic based counter arguments. Identify and counter actual self interest of the opponent instead.