That's just people though, if you walk around with a scar on your head you'll see lots of knee-jerk immediate reactions. Some people are able to mediate those initial reactions and be kind, others just go with it and treat people poorly. Yes - some people are a'holes, and treat those without legs poorly.

The same is true of basically anyone that doesn't fit into what you typically see - there's always some people that will treat them poorly. It's unfortunate, but was probably adaptive during our evolution, and something we just have to deal with today.