Regarding the use of the 'aggressively conventional minded'. When I was younger I would think that these kind of people were mostly just detrimental to society but I have come to see that they sometimes have a use. It is this kind of people who were the first to see that immigration and multiculturalism have their limits. For instance, salafism cannot just be seen as just another opinion that people can have. Of course, the 'agressively conventional minded' would put it in a bit more stark words than 'have their limits' and would also extend their warning messages to far greater groups than actually warranted but the other three types of people might just close their eyes to the whole problem. Generally, the 'aggressively conventional minded' can be helpful when a society is in danger of degrading into lawlessnes. They will be the first to sound the alarm and sometimes they are right.