By definition, a phobia is an unreasonable fear that has a psychological pathology. It may not be “cowering in fear” but it could manifest in some other way that makes it impossible for the person suffering from the phobia to function without severe psychological stress.
A phobia is not exhibiting prejudice or hatred. But semantics aside, the idea that anyone who cannot accept homosexual behaviors as “normal” is doing so out of hatred or prejudice is just posturing and, as mentioned before, usually put forward as a way to shut down the conversation and to reject the other person’s right to an opposing point of view.
Well, prejudice is not the same as hatred and neither are the same as a phobia. Yes, discrimination for those who present themselves openly as embracing an alternate sexuality exists. Sometimes, but not always, it is unjust discrimination. Sometimes, it is quite just. Hatred is a real experience for such people in some cases. But, as a group, at least public, they are more likely to either perceive or characterize any disagreement or lack of acceptance as “hatred” or “prejudice” when it is more likely simply a rejection of the idea that their choices are “normal”.
There is a lot of discrimination in this world. Catholics are discriminated against, other Christians are discriminated against, men are discriminated against, women are discriminated against, criminals are discriminated against and yes, people who embrace sexual deviance are discriminated against. It’s part of life in a heterogeneous society. Discrimination is simply to choose based on some characteristic.
Discrimination, especial that which is not unjust, is not a phobia.