Not just incels are like that. This is one of human's natures.
People tend to be reluctant to achieve education if the other side is not their teacher or smth like that, and people have different opinions. It is always a rigmarole to successfully make the other side accept your opinions that are different, particularly there are confounding factors including your face(yeah... there is no need to cope... face indeed factors in how easy it is for your interlocutors to accept your opinions), how you talk, how you construct your words, etc.
For ex, I, as an 'autist' in many fields including Economy, have argued with some economic ignorants who believe 10, 000, 000 rmbs net assets are just average in China while they are even very rich in Japan and America ntm in China, a country where there are 600, 000, 000 people whose monthly incomes are under 1000 rmbs, whose rate of poverty is exceedingly high, etc. because of their severe lack of economic common knowledge(they don't even know what 'Middle Class' is... yeah) and my latent anxiety about my richness because of my 'traumatic attitude' towards my height, caused by years of being ingrained with blackpillism, one of the reasons why I don't like blackpillism, only to get poked fun of because they think I lack of knowledge, I have yet to see rich people, I am very ignorant, etc. lol.
Many of my experiences with incels are very pale. I only got blackpilled and I could not get anything positive and meaningful from them. I only see them complaining how they should've not been born, how they hate their parents, how girls nowadays are different from them in the past who even would rather choose a 185cm lanky stupid abusive awfully-educated drunkard whose net assets are negative millions of rmbs than a 160cm handsome muscular rich Harvard graduate, etc.