Deliberate misrepresentation can only be employed if one understands the original intent.

If a malicious person wants to try to convince others "Black Lives Matter" means "only black lives matter", they may have a pretty clear shot (assuming they're trying to convince someone Right of Centre).

If it was rebranded to "Black Lives Matter Too", then they would have a harder time trying to be deceitful.

I'm convinced there are more people in the camp of failing to read between the lines.

In either case, language games are important; playing poorly will lead to catastrophic outcomes. The worst part is this is so easy to correct for - a little bit of imagination will illustrate predictable backlash, or lack thereof.