No I'm not.
Secularity is simply the state of being separate from religion. The only connection that I see between Christianity and Capitalism is that they co-exist and that Capitalism generally does better co-existing with some religions than with others.
So I declare that Capitalism is just as secular as Nazism and Communism. It doesn't depend on religion. It doesn't need religion. It doesn't address religion. That is what secular means and you cannot exclude Capitalism from the list of secular philosophies no matter what you think.
So I will stand by my statement that it is not secularism that kills people in wars - it is socialism and the coercion that is inherent in trying to impose that ugly philosophy on human beings. Lenin didn't just kill Christians and Jews. He killed people who refused to give up their land. Hitler didn't kill Christians but he killed Jews, just like the Islamics want to do today. What is is so secular about that?
My point restated: Countries who trade with each other and provide for a common defense under a secular Capitalist arrangement do not go to war with each other. Don't blame Secularism as a way of defending the brutality and death that religion has brought and continues to bring to the human race. Blame Socialism and (these days) Radical Islam.
Allies don't go to war with each other most circumstances. And the phrase 'a common defense ...' cuts a pretty narrow slice of history, like only the 'NATO' countries? They have a lot more in common that just capitalism.