what were the causes of the most deadly football brawls in Europe?

 The causes behind deadly football violence will always vary considerably depending on the source you choose to consult

1

. However, some of the most common causes of football brawls in Europe include:

• Rivalry between teams: Many football brawls are caused by the intense rivalry between teams and their fans. For example, the rivalry between Liverpool and Juventus fans led to the Heysel Stadium disaster in 1985, which resulted in 39 deaths
  3
  .
• Poor stadium design: In some cases, poor stadium design can contribute to football violence. For example, the incident at Hillsborough Stadium in Sheffield, England in 1989, which resulted in 96 deaths, was caused in part by overcrowding and inadequate safety measures
  1
  .
• Inadequate security: When security measures are inadequate, it can be easier for fans to engage in violent behavior. This was a factor in the Heysel Stadium disaster, as well as in many other incidents of football violence
  3
  .
• Aggressive behavior by fans: In some cases, fans themselves are responsible for starting fights and engaging in violent behavior. This can be fueled by alcohol consumption, as well as by the intense emotions that come with supporting a football team
  2
  .

It is important to note that football violence is a serious issue that can have deadly consequences. Fans should always prioritize safety and respect for others when attending matches.

Citations:

[1] https://idrottsforum.org/alsio130118/

[2] https://bleacherreport.com/articles/1321624-world-footballs-10-most-dangerous-fan-bases

[3] https://en.wikipedia.org/wiki/Heysel_Stadium_disaster

[4] https://bleacherreport.com/articles/1148322-soccer-10-biggest-on-and-off-field-brawls

[5] https://en.wikipedia.org/wiki/Football_hooliganism_in_the_United_Kingdom

[6] https://en.wikipedia.org/wiki/Football_hooliganism