Why is are liberals called crybabies when they oppose something or protest, but when republicans do it, it is normal?

Republicans have a tendency to forget that when Obama became the President, black churches were burned down, there were protests, Obama effigies were burned, anti-Obama signs with a hang man noose were displayed, etc.

Republicans don't march the streets and destroy the city and then when you ask them why they are rioting, they really have no answer other than, "Trump is racist."

because they tear apart cities!!