I'm not sure the MAGA followers are evil, but the MAGA leaders sure are. I think a lot of the MAGA followers are like cult members who desperately want to belong to something and fit in somewhere -- to not be ridiculed for their beliefs, however bizarre they may be. I'm not sure that would be considered "evil." It's the people who take advantage of them who are evil, considering all the harm it causes. They lack a functioning conscience and basic decency.
Evil is enjoying the pain and suffering of others. Evil is wanting to control the world at what ever cost, even without regard for human life if necessary in order to obtain that utmost power and control that they so live for. The problem with evil is that it comes with so many different faces, even an evangelical one, making it nearly impossible to see evil in your face, until it's too late to react. But I firmly believe that in the end, good will always triumph over evil.