Instead we should let the regretful and remorseful ex-chuds come crawling to us, the ones demonstrating willingness to put in the effort to change.

No one comes crawling to fringe groups. As I said before people overemphasize how common it is for people to go from chud to leftist and it's dumb to focus on these people. But you don't have to make someone your comrade immediately, there is lots of things in between. When someone who is shit happens to support something that is good, you encourage that.