An unrelated UN speech is not going to help in the BLM movement.

Instead use:

Use quotes from black activists, from those who are personally affected in this, from the families of those who have lost someone, from the many speeches and pieces of literature regarding it, etc.

And if someone tells you they aren't okay with it, please do not react like this:

Understand your privilege and learn what you can actually do to help. Instead of posting 1 photo of an unrelated speech, learn about the many other ways you can show true support.

Sign petitions, donate/volunteer whenever you can or help to share info on how others can, call your senators regarding the situation, educate yourself and the people around you, shut down casual racism that would otherwise be ignored, learn the names and faces of those lost.

Please check out this thread to learn how to help https://twitter.com/tpwkhollands/status/1265757092473954306?s=19