Any actual conservative should at least support BLM's agenda (not so much the tactics in every case), so that is a bright sign.
Beck's motivation is his sagging career. Now that Trump is the most polarizing figure on the right, he's using this as a chance to seemingly moderate his stance and get back on CNN now that the Blaze has pooped the bed.
There are crazies in BLM just like any other movement. Most of BLM is pretty peaceful.
I liked him when he was on CNN and somewhere around when he moved to FOX I got sick of him.
In BLM, it just so happens that the crazies are the ones with influence in the movement.
Yeah, one can support the objectives of BLM without supporting BLM itself.
And it's been a well-known fact that the conservative "info"-tainment complex is all about maximizing money, not a coherent set of policy positions. So Beck's shifting is no surprise here.