There's the proverb "sees a speck in another's eye, but does not notice a log in his own eye". No major country is innocent, yet dismissing them all as equally bad is wrong and unacceptable; they do allow comparison, and Western countries come much better for their record of wars over last decades than some others.
First doing their own is like asking to postpone space exploration until all problems on Earth will be solved. Not to mention that space exploration helps solving Earth problems; postponing flying to space can thus be indefinite, as on Earth you can almost always find problems. Western hemisphere only recently had a situation with no wars; you can then always point to smaller conflicts. West has to improve, yes; however that doesn't mean we shouldn't hold some non-Western countries as more accountable for bigger international problems.