The nature of politics often leads to strong beliefs and convictions about certain outcomes. In this case, some pro-Trump supporters may firmly believe that he will win. This belief itself is not dangerous as it is part of the political process for supporters to earnestly believe and rally for their candidates.
However, should these supporters not respect the electoral process or resort to violence and intimidation if outcomes aren’t in their favor, that can indeed become a dangerous scenario. Respect for the rule of the law, peaceful transition of power, and acceptance of electoral results are fundamental principles in a democracy.
But it’s important to note any group, regardless of political persuasion, can potentially become dangerous if they choose to not abide by these principles. Public figures, media, and individuals themselves share the responsibility to ensure all political discourse occurs within the framework of democratic norms and values.