I made a few edits to your post to more accurately reflect those of us you might refer to as "avid Trump supporters" but might be more accurately called "Conservatives".
I see no harm or disrespect in the story you linked. The hospital visit was covered by virtually all news outlets so the image was widely distributed at the time and the majority of citizens agree with the stated goal of "banning bump stocks and strengthening background checks".
While I agree that it might be considered bad taste, I think most politicking is unsavory.