It's not necessary to drag USA, but it's just an example of how stupid these arguments are. Historical facts needs to be analysed with the lens of what was considered normal at that time not with the lens on what we consider to be normal today. As many slaves were used also to build the pyramids for example or to some extend modern slavery is a thing in some countries (look at how Qatar is handling the construction of the stadiums for the 2022 fifa world cup). Why aren't we offended by what happen today as we've the right sensibility to understand this things?
If that was not a great similitude is this a good one instead:
This are pretty much modern and new example, instead of paying so much attention to what happened 2000 years ago you should consider to fight in order to avoid this things to happen again. Instead of doing some empty consideration on pretty old facts.
If that was not a great similitude is this a good one instead:
https://en.m.wikipedia.org/wiki/Video_of_U.S._Marines_urinat...
https://en.m.wikipedia.org/wiki/Abu_Ghraib_torture_and_priso...
https://en.m.wikipedia.org/wiki/Human_rights_in_post-invasio...
This are pretty much modern and new example, instead of paying so much attention to what happened 2000 years ago you should consider to fight in order to avoid this things to happen again. Instead of doing some empty consideration on pretty old facts.