It's common for an abusive spouse to become kind and gentle as a way to suck you back into their life/power.

With time we often forget the bad things and remember the good things, I hope you can move on and build a better live without him in it.

And as far as the timing of things, I would call that karma.

And if you really want contact to end, don't call write, text, email him. And if he tries to contact you don't pick up the phone, don't read the text, tear up the letter without reading it, don't even contact him to say you don't want anymore contact.