I want to know the answer to the following question:
Will mainstream political parties not cooperate towards outsider parties if they are too extream?
All the background I'm provided with is that "Cordon Sanitarian, however, have been increasingly abandoned over the past two decades in multi-party democracies as the pressure to construct broad coalitions in order to win elections – along with the increased willingness of outsider parties themselves to participate in government – has led to many such parties entering electoral and government coalitions.". Is that enough to answer the question?
Answer: no