He wasn't always the nomation. It should have been:

"Wow Trump is trying to run. Weird. Anyways, moving on."

You look at all the people giving "commentary" as they play his full speeches of racism and go "lol no one will listen to that". When clearly a lot of networks covering an (at the time) niche candidate gave him more attention.

Also, lying is cheap. Investigating the truth costs time and labor. I can just say "The president is actually always mind controlled by Jews who are actually aliens" and it will take reasonable people longer to explain why that's stupid, or look into why someone says it.