Deletion of Massacre of Brzostowica Mala

Comment: Per all arguments above. If information by nationalist newspaper, gets published as an abstract on press overview website by IPN, this does not make information any more reliable, because the source of this information still is nationalist newspaper, and not IPN itself. Delete per  and 
Stance: delete
Cited policy: Wikipedia:No original research (WP:NOR||WP:RS)