The inference from Shakespeare's "The Tragedy of Romeo and Juliet" that is best supported by the text is the destructive power of hasty and intense emotions. The play vividly illustrates how the passionate and impulsive actions of Romeo and Juliet, driven by their intense love for each other, lead to tragic consequences. This theme is underscored by the rapid development of their relationship and the series of rash decisions they make, ultimately culminating in their untimely deaths.