Why do SO many people dislike transgenders?

I've heard so many people say really hurtful things to them. They make fun of them. They harass them and they leave hateful comments on social media. The way some people look at them when they walk past them
.. It really makes me wonder what's their problem? They are not harming you or something, so why do so many people dislike them? What happened to live and let live? It breaks my heart when even their family cut off ties with them. It's really sad. I'd appreciate your input
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I did not expect to get this many answers.
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Those who answered my question respectfully, thank you. Those who got mad at me for posting this question and started insulting transgenders, just grow up already.
Why do SO many people dislike transgenders?
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