I doubt Michael siding with the Rosatos / Roth, on the Bronx territories, can be regarded as a licence to kill Pentangeli

I can't see the connection as to how Michael siding with the Rosatos, on those three territories, makes outsiders Rosatos “see killing Pentangeli as logical and permissible"

Besides it is up to the Corleones to make Pentangeli 'answer' not small potatoes Rosatos