I distrust short males
Are you suspicious of me because I'm a short male?
Yes, because you could be a potential rapist.
It doesn't make sense to judge the trustworthiness of a man based on his height. Height has nothing to do with how good or bad someone is. You should judge people based on their character, not their appearance.
I just don't trust short men.
I think your bias must've stemmed from someone in your past. Both short and tall people can be untrustworthy and you shouldn't let one incident cloud your judgement.