That article is completely discredited. It implies Sidnick died of blunt force trauma from a fire extinguisher. Sidnick's official cause of death is natural causes, which means that another human did not substantially contribute to the cause of his death.
The "natural" classification is used "when a disease alone causes death," the medical examiner's office said in the summary. "If death is hastened by an injury, the manner of death is not considered natural."
Sicknick was previously believed to have died from injuries sustained during the riot.
www.cbsnews.com
None of the others have credibility or were necessarily caused by MAGA either

, according to your link...
Benjamin Phillips, 50
"... he had a stroke and died, although authorities have not confirmed at what point during the attack."
Kevin Greeson, 55
"... died of an apparent heart attack at an unknown point during the events."
Rosanne Boyland, 34
"... died of a medical emergency during the riots."