Unfortunately Trump isn’t the real underlying problem; the republican party will churn out someone even worse who is not a convicted felon.

But wait until after the Republican convention.

That’s not how the ruling works.

Biden could go shoot Donald Trump (in broad daylight on 5th Avenue) and could not be prosecuted for it.

He cannot make new laws. That’s still Congress’s job, for now.

Make it so felons cannot run for president

How does immunity let him do that?

Doing that would require changing the constitution. Legally, this would let him go and scribble new words on the paper version of the constitution. He would be immune from the charge of vandalism. But, that wouldn’t actually change the constitution.

That’s a legislative thing, not a crime to just be immune for.