Yes both of those statements are true. Difference being the anti cop narrative was born from abuse of power by bad cops and calls for reform while the stolen election narrative was born as a dishonest excuse to pad the ego of a spoiled billionaire.
Irrelevant. The fact that they made almost no distinction between bad cops and good cops is precisely why people started hating and criticising law enforcement in general and as a result, good cops were murdered.
The narrative being pushed never differentiated good cops from bad cops. This resulted in officers being denied service in restaurants and coffee houses and ultimately to outright assassinations.
In other words, theirs was just as much blind prejudice as that which they accused officers of.
As for violence from right wingers, this antagonism didn’t come from nowhere and does not mean that conservatives are more prone to violence. This all started when Trump got elected.
Democrats spent four years fighting Trump at every turn and trying to get him out of office and accomplished virtually nothing of what they were elected for: passing bills and conducting government business.
In the meantime, Democrat voters were conducting their own crusade to vilify and demonize Trump supporters and yes, committing violence and assault against them.
To top it all off, we have a president who campaigned on the promise to unify the country and turned around and did the exact opposite.
The relentless hounding of Trump and the abuse and vitriol heaped on his supporters convinced many on the right that Democrats would try to steal the election long before the election took place.
When Trump claimed the election was stolen, he was not initiating the narrative, he was simply echoing what many on the right were already thinking.
None of this is to say the election was stolen. But it does show that there is a reason for it; that it was not conjured from thin air and there’s much more to it than a billionaire’s bruised ego.