There was a full-scale civil war in Hungary, and USSR sent troops against insurgents who started hanging Soviet people on lamp posts.
The *Soviets* who were hung in Hungary were as I recall, Hungarians who had been colaborating with the Soviets. These people were viewed as traitors to Hungary and as such were executed.
The Soviets also used MiG's to bomb the Hungarian forces, tanks fired at buildings, blowing them apart, just because they saw movement in the building. The Soviets had to bring in troops from the east because the garrison troops had gotten to know the Hungarians and weren't ruthless enough.
Don't start spewing your Soviet propaganda on this one Boroda. I've read many of the eyewitness accounts from participants who escaped during the aftermath. What the Soviets did in Budapest was reprehensible.