Hayek dealt in ideas, not politics. People do not get awarded the Nobel Prize in economics for their political views. Political propaganda ought to be distinguished from ideology. Political propaganda is intended to promote a political party or a special interest group. In other words, its goal is political power by whatever means it can muster, including obfuscation and deception.
Ideology is intended to defend a particular view of the kind of society one presumes is desirable.
Both views about policy and ideology are defended with arguments. So each can be discussed with respect to the validity of their arguments. However, the goals of the political propagandist and the ideologist are different. Frankly, I prefer not to see postings of either type. But IPE books usually begin with a discussion of ideology.