How do Trump supporters(who believe the virus is fake) react with a family member or friend dies of covid?

Aww bless your heart from all the false premises and strawman you post.

"...who believe the virus is fake)..."

If they are really, really stupid (and Trump supporters typically are) they will deny that the death was caused by it.

There is a nurse in South Dakota who was blogging and documenting instances where patients on the brink of death were still insisting that the covid disease was fake (https://www.miamiherald.com/opinion/opn-columns-bl... is heavy duty, professional grade idiocy... One has to take performance enhancing drugs to be that dumb.

Many times on facebook I have seen people post that a family member passed away from Covid and the comments flood with people calling them a liar, shill or suggested that the hospital was lying and they will never tell you the truth. Its a little crazy 

they convince themselves that it was something else, they are brainwashed into not believing anything that goes against their conspiracy theory  

the virus is real...

the political response was the hoax....

....hope that helps

Those people are crisis actors.