As for the vibration it's uuuuuuu-rrrrr-uuuu-zzzz (that's to answer your first question) As for your 2nd question that probably because just like our physical bodies we have to know our limits before we over do it,so the same for our chakras....but then that's just my observation if any other...

I don't care  for these parasitic entities who wish only death for us gentiles 

Yes you are very welcome here because you are a gentile and to help you feel better I am nahuatl Indian with Spanish European descent but my native blood is so prominent my features are of the nahuatl Indian and because of the Spanish European I am taller than the others