I wonder where all the people are, including the arse-wipe media, that were railing against Obama when he suggested that Brexit would not be a wise move? How come they are not screaming and shouting about US interference in UK policy now?

It may be a rhetorical question, but that doesn't mean that there is no answer.

Obama's intervention was in support of what the government of the day wanted (some have even said it was specifically requested by someone within the government).
Trump's intervention is in support of what the people of the UK voted (by majority) for, and does not sit well with the intentions of the current government.