Alonzo Fyfe

The short answer that I would give to this question is that two wrongs do not make a right.

If the homophobic attitude generated a sufficiently large danger to others, the hypothetical treatment discussed may not be wrong.

If the intolerance is not itself generating wrong behavior -- if it is a prejudice not being acted on in ways that are harmful to others -- then there is no reason for making the alteration.

If the intolerance is generating wrongful behavior (harmful to others), then the alteration may itself be justified. We may demand a great many things of those who engage in wrongful behavior, including therapy (e.g., drug treatment, psychiatric treatment, forced medical procedures such as chemical castration).

If the homophobia causes the person to be a danger to others, and if this form of treatment can be shown to be effective in generating a change in attitude (which, by the way, I doubt -- the patient is likely to view the change as forced and unnatural), then it would be justified.

In neither case do we have an instance of "two wrongs make a right".