No they did, just not nearly to the effectiveness that guns did. Bows and arrows were quite as effective. They also didn't tend to trick each other in to signing agreements, and being forced on to the worst pieces of land. Like I said if you think everything was on the up and up, why don't you give me everything you own. Seems like a fair deal, I won't kill you and you can keep the clothes on your back. FYI I will even load you up with alcohol, so you can drink your days away.
See I can admit that some native americans killed each other. Can't you admit, that north america was inhabited by over 95% of native americans, and we reduced their lands to less than .0001%.
"According to estimates, approximately 4 million Native Americans were killed in the United States from the arrival of Europeans until the 19th century, primarily through warfare, disease, and forced displacement from their lands; this is often referred to as a genocide."