Why would anyone make fun of another person who has survived 2 brain surgeries?

As a pharmacist with my Doctorate degree, I find it very disturbing to disrespect Joe Biden by joking about his past medical issues.  Joe Biden did have 2 aneurysms in 1988. He also had a high risk of death, and permanent brain damage. He luckily did not die or suffer permanent brain damage.  His neurosurgeon has made it clear that his brain has not been permanently affected.  His brain function is normal. I freely admit that Joe Biden and myself disagree on almost every single political topic. Stooping down to the level of blasting him for brain surgeries is completely unacceptable!!  

Does anyone truly think it is ok to mention a persons surgeries, and use them against him politically?