Obama has blood on his hands. So what? Does that mean I can't call out Trump for the sexist, racist authoritarian that he is? The man is scary and he disgusts me. That has absolutely nothing to do with Obama or anybody else! The man is who he is. 

Is there no line at which a conservative must stop because, you know, Obama? Grabs women by the p****? Obama! Tells outright lies about anything and everything? Obama! Puts racists and corporate robber barons in charge of the economy? Obama! Sends desperate refugees back to the despots and murderers they just escaped, to be tortured or killed? Obama!