Do you value artistic output over religious diversity? is imperialism that doesn’t last better or worse than imperialism that does? and are certain kinds of warfare inherently wrong?

1. Both are extremely important. The artistic output is what makes things last and leaves a trace for the future generations. Also it is important in general as it spreads ideas, different view points, knowledge, beauty and it generally inspires people and addressees problems. Religious diversity is important because not everyone believes in same things and it is important to foster religious tolerance which is important for a large multicultural states to survive. Also religion is one of the most important parts of human existence to many people and therefore it needs to be respected.
2.There is no easy answer to this question and it mainly depends on the person. Imperialism that doesn't last may bring some ideas to the people which would help them later and if the rule was harsh that just means that sooner the people will be free. On the other hand the one that lasts can also lead to many good things and give people some extremely important benefits like democracy in Hong Kong but it also led to great atrocities like the ones in Africa.
3.We can usually say that the there are some that are inherently wrong like chemical warfare because of its undiscriminating nature and the impossibility of its application on a specific point. It spreads and kills civilians and soldiers alike, no matter the side.

No-one is. We all make mistakes, and no-one knows it all. Don't beat yourself up because of others or your own thoughts.