Something being inevitable is different from it being justified.
Hamas’ and Palestinian Jihad’s violence is a predictable response to Israel’s abandonment of two-party talks and its right wing’s ascendency within its politics. That doesn’t justify gunning down kids at a concert.
Similarly, the IDF levelling much of Gaza in retribution was a predictable repercussion of killing Israeli civilians, including children. That doesn’t make their deaths fair.
> do you have full rights to complain about what you made inevitable happening?
No, it undermines the complaint’s legitimacy.
That doesn’t mean we must be unsympathetic; but it is a factor. Also, these decisions are often made by individuals within groups. Collective punishment is immoral. It’s also quite likely to produce blowback.