If you are confident of your ideology and the reasoning behind it you will invite and welcome alternative views as an opportunity to demonstrate the advantages your position and views supposedly offer. If on the other hand you are not confident and capable to reason and present the logic and strength of your ideology, but instead it is based on a shallow set of premises, poor reasoning and desire to belong to a group of fellow believers, you will stumble and revert to reactionary silence and inability to engage in and win the contest of ideas.