It's actually not plain old settler colonialism because Jewish people are also the "indigenous" inhabitants of those lands - but instead of sharing them with the non-Jewish indigenous inhabitants (now called the "Palestinians") the militant Zionists have declared a "Jewish State" where they systematically discriminate against Palestinians (e.g. no right of return for non-Jews & hardly any building permits for non-Jews in the West Bank).

Regarding bombings & war crimes, they have indeed been done by both sides. The crimes of Palestinian terrorists are obvious, but there is widespread denial & attempted justification of the IDF's crimes, hence the topic generates a lot of writing & debate. Examples of IDF crimes are the bombing of houses with many children in assassination missions (these are obviously not preceded by warning phone-calls) [0], and the shooting of Palestinian protestors at the Gaza fence who do not pose a risk to the lives of IDF soldiers.[1] The data ([2]) also speaks for itself.

[0]: https://www.haaretz.com/israel-news/gaza-israel-wiping-entir...

[1]: https://theintercept.com/2018/04/10/gaza-protests-palestine-...

[2]: https://statistics.btselem.org/en/all-fatalities/by-date-of-...