shooting in a Swedish school on Monday last in which one teacher was killed,
That would be the stabbings in a Swedish school last Thursday perhaps?
theguardian.com/world/2015/oct/22/pupils-wounded-in-sword-attack-at-swedish-school
The attacker was shot dead by the police.
Your title is inaccurate and misleading.
What does it have to do with Poland?
I have to agree.
This type of thread is going to be responded to by resident and guest racists alike.
One could pick any subject and say ' Could this happen in Poland?'
The fact is that although no-one yet knows the attacker's motivation for the attack, the fact that it occurred in a an area of Sweden inhabited by a large number of immigrants is going to be enough for some people to immediately jump on the 'it must be the fault of the immigrants' bandwagon.
I'm sick of hearing about it all to be honest.
This is not Polish news.