The hunt for the political ideology driving each murder that makes the news obscures some key points. The shooter has, at the very least, the shooter ideology. It is an ideology as opposed to basic historical facts as climate denialism or trusting political candidates. Or he may imagine that shooting hateful bigoted people is a brilliant way to bring us all together. So, you may have an ideology, and it may be very clear and coherent and dear to you, but as long as you are shooting people, what matters is that you have a shooter ideology that overrides the rest of what you care about.