"Look at that man in the high heels, wig, and cone-like fake boobs! He must be a total loon!"
Are you making fun of transexuals?
Unfortunately yes. Trans men are funny, in fact I have known three of transgenders. One of them has been arrested for murder, one was a prostitute and another one beat me up when I told him he shouldn't set his wig on fire.
It's hurtful for a person to make fun of a trans man, especially pointing him out in public. Instead, you should respect the life choices that other people make, as you would want your choices in life to be respected.
The reaction from the men in the grocery store was an indicator of their true character.
I really don't think you should be making fun of transgender men like this. It's very hurtful and I feel as if you should try to accept them for who they have become.