Unfortunately for Mr tRump, his politicization of everything has taken what may have been an unfortunate choice of words and turned it into -surprise! A race issue.
I can forgive Mr tRump for his poor choice of words- how can you possibly console someone at a time like this- especially if you’re a stranger. And Mr tRump is a verbose imbecile whose rhetoric is normally confined to monosyllabic repetition. So yeah, it’s a given he’s going to say something stupid- it’s inevitable. The only wildcard is the degree of stupidity or inappropriateness.
But when you have an unapologetic(?!) white supremacist in the White House, trying to console a non-white person about their non-white loved one, any misstep is going to be seen as racially motivated. 
Notice how tRump immediately compared his actions to those to the last REAL President as proof. Why did he not compare himself to Dubya?