I am (sure it's true, for that hard one:
"love your enemy"), only by dint of experience. I was a non believer (at least intellectually) and had a real enemy of a kind in my late 20s, and tried to test that proposition "love your enemy" which I thought would not work out well. It worked shockingly well, making him into a friend and us both happy to see each other even years later. It was just shocking to me. Ask if you want more on that one. But it was fantastically difficult to do, in that first minute, and was physically spent just from the mental and emotional effort, and trembling, and unable to drive for a while, and felt out of my body. That's how hard it was to do, in person. But
now it's not that hard. It's not hard now. So, that's just actual, real, experience, first hand.
Now, about whatever some group of people labeling themselves Christian do, there are 2 billion that identify themselves as Christian on Earth. As you could expect, in such a huge number, there is very variety of good and evil happening. Christ said the way to know whether or not a person belongs to Him is by whether or not they are visibly doing "love one another" --
John 13:35 By this all men will know that you are My disciples, if you love one another."
See? It's explicit, literal.
And also:
43“No good tree bears bad fruit, nor does a bad tree bear good fruit. 44Each tree is recognized by its own fruit. People do not pick figs from thornbushes, or grapes from briers. 45A good man brings good things out of the good stored up in his heart, and an evil man brings evil things out of the evil stored up in his heart. For the mouth speaks what the heart is full of.
Luke 6 NIV
What are those fruits though?
Galatians 5:22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness,
Galatians 5:23 gentleness, and self-control. Against such things there is no law.
See?
So, ergo, the only possible conclusion from these kinds of express statements: only those doing as He said (generally, much of the time at minimum) could possibly be His. Of course, a person can have a bad day, stumble, do wrong. It's their average actions, on the whole, we can look to see.
So, if you only point to a group of worldly political people doing a wrong, and then suggest that represents Christians that would be an error. Better to go to a few churches and ask people face to face questions (once it becomes possible again).