Reactions: This led to backlash, particularly from Trump supporters, who argue it could incite violence. This backlash intensified following an assassination attempt on Trump shortly afterward (The Daily Beast) (Yahoo News - Latest News & Headlines).
Investigation: The FBI is investigating the incident, but there is skepticism about the FBI's impartiality and trustworthiness from some quarters (PolitiFact) (DNyuz).
In conclusion, the intent behind Biden's words is unclear, and it could be interpreted in various ways. I don't have a definitive answer.
ChatGPT
A day before FJB once again wanted to ban "assault weapons" - KEK!
https://x.com/JoeBiden/status/1811912830230102116
The shooter Thomas Crooks donated to Biden:
https://x.com/smi2k1/status/1812372167687917669