Under the first amendment, Americans have the right to celebrate the death of anyone they please. It might not be tasteful or respectful, it might be inflammatory, but that's an American freedom enshrined in constitutional law; freedom of speech is integral and fundamental to the US national identity.
As to your last point, I don't recall BLM ever storming the capitol and defiling the building by smearing the walls with their own feces, but in any case, rioters are criminals under the law and should be tried and charged according to due process.
As to your last point, I don't recall BLM ever storming the capitol and defiling the building by smearing the walls with their own feces, but in any case, rioters are criminals under the law and should be tried and charged according to due process.