I'm a Christian, but I wasn't always, and I understand many of the arguments against it. I'm also more of a perennial philosopher. Because of that, there are many Christians that would say I am a bad Christian or not a true Christian. I welcome that criticism with open arms.
The problem with engaging in spiritual warfare with other groups is that many of us are spiritually ignorant. The real spiritual battle is within. Once the battle is won for our own hearts and minds, then and only then should we engage in spiritual warfare outside of ourselves. Why? Because then we know what the hell we are talking about, we know what we are doing, we understand how not to cause more harm and compound the problem. More importantly we know God is calling the shots, not us. As it is, many people take in the Bible as data and regurgitate it as data without truly knowing. (That's not directed at anyone on this forum, it just a generalization) Every day is a spiritual battle within, and with others. The opportunities to plant the seed of love in everyday life are endless. And it's a slow, never ending process...it takes time for seeds to grow. Generations, lifetimes even.
It is my opinion that our current approach to fighting extremism/terrorism is making matters worse. Look at all hatred we dump on entire groups of people and religions. Is that Christ-like? Look at all the civilians that are killed as collateral damage. Is "collateral damage" what happens when we have God in our hearts? If we be still and know God, we know love, we know "peace beyond all understanding" when we act not of our will but of God's, that is, when we know God in our hearts, it is expressed outwardly as compassion, kindness, understanding and love for our brothers and sisters. It is an automatic selflessness to benefit others. Not just to do no harm, but to heal.
When we close our borders, point our fingers, judge, hate, seek vengeance, divide and kill we are not acting in love but fear. Spiritual warfare without love is just war.
When we act in fear and seek to protect what is "ours" through violent retaliation we are doing more harm than good. By rejecting refugees, hating Islam, and killing civilians we are not protecting ourselves and eliminating a threat. We are creating a bigger and stronger enemy with deeper roots. When we kill a child's parents we plant a seed of hate in that child. When we kill a child the parents want revenge. When we turn away people seeking safety we plant seeds of resentment. When we spew hateful ignorance at people that look different and practice a different religion we are only making ourselves their enemy.
I believe that in fighting this spiritual battle with extremism we need to look deeper than we currently are. What we tend to focus on is the obvious. People are brutally killing other people. That's bad. They are doing this because of Islam. Islam's bad. And we stop there and we go to war with people of Islam. But if we look a little deeper we may see the economic struggles of the people, we may notice the lack of education, poor living conditions, shortages of food, unemployment, any number of things that contributes do a shitty quality of life. The terrorists promise to fill those voids in this life and after.
While we're dropping bombs on the land and ignoring the root cause, we're making matters worse and ensuring this battle will last quite a bit longer. We're wasting money, resources, lives all while strengthening the enemy. Spiritual warfare steeped in ignorance is just war.
I am of the opinion that love is the answer. God is the answer. What would that look like? To me, it is providing a safe place within our borders so that the people fleeing can start anew. It is acceptance of those people and their religion, so they feel welcome here rather than rejected. It is an understanding that we are dealing with human beings just like us with the same needs. It is helping the people that live in "terrorist hotbeds" attain the basic needs for life, an education and potential for employment.
How do we defeat the idea that we are the enemy? By not being one.
Spiritual warfare: We're doing it wrong.
(^think I'm gonna turn those into number stickers)