When one is davening and in the middle kadish is being said should he stop for entire kaddish as well does it make a difference which part of tefillah he is in? I understood that you should stop for entire Kaddish and say amen for all (except for brich hu in psukei dzimrah) (in place mutur to) however I’ve seen rabbanim continuing and maybe stop for yihei shmei rabba and amen after brich hu what should one do? Lichorah the Mishnah brurah says like me (haven’t checked it up in a while and don’t know where to)
I am assuming that you mean to ask regarding the halacha that when one is davening Shemona that he doesn’t answer Kaddish of Kedusha. The Shulchan Aruch 104-7 says that although he doesn’t answer with his mouth, he has to stop davening and listen to the chazan as he is saying these words. We do not have to stop davening for the whole Kaddish, Kedusha etc., but only for the things that we would have to say if we would be in middle of Birkas Kriyas Shema. These are; during Chazoras Hashatz for amen of h’kel hakadosh, and shomeya tefilla, and when the chazan gets up to modim, to listen for the first three words, “modin ananchnu loch”. During Kaddish for amen yehei shmei rabba – until the word yisbiorach, and the amen of “d’amiron b’olma vimru amen”. During Kedusha, for the posuk of kadosh, and boruch, to answer borchu. (According to the Aruch Hashulchan he should listen until the tzibbur says Boruch H-shem hamivorach..). Therefore what you saw the Rabbonim do is correct.
If he is in middle of Birkas Kriyas Shema or Pesukei D’zimra, he also only has to stop during those words, however he also has to say them with the tzibbur.
Shulchan Shlomo 104-3, Eishei Yisroel 19 ftnt. 17 in the name of Horav C. Kanievsky shlit”a that one only has to stop for the actual words that have to be said. Also see Aruch Hashulchan 104-13.