I gave a blind guy a handgun And told him it was a hairdryer.
Is that a joke about the recent shooting of a Congresswoman?
It's a joke about blind people.
It sounds like you are suggesting that blind people should be tricked into killing themselves, and this is highly offensive.  They are not a burden on society, and most have learned to live their lives with very little help from others, so they should be encouraged to succeed, not preyed upon for the amusement of others.