If everyone truly realized how much Jesus truly loves them, I believe so many hearts and minds would change! .... Salvation is a free gift to us, but it is not cheap. It cost God His only begotten Son, who laid down His life for us. No one took it (John 10:18).
And don't get it twisted, satan does not mind religion. That's why there's plenty of them. The enemy has too many people convinced that they can just do good things and be nice people and that will get them into whatever version of "heaven" or "paradise" they believe in. But what satan gets upset about is one's real relationship with and life-change in Christ Jesus. If your "Christianity" doesn't involve striving to follow after Christ, but instead you're just following a bunch of religious rules, are you really a Christian?
Now I'm not saying you have to be a perfect Christian, for there is no such thing. We all have flaws. But what I am saying is that we need to make sure we have invited Christ in so that He can work on our hearts as we grow more and more in Him after true conversion has taken place. Christ does the perfecting over time as we grow over time.
I just want to encourage and inspire as many people as I can for Jesus Christ.