OK, after a few tours in NI, my advice.

Wear something other than the kilt with Scottish national symbols. First off, St. Patrick's day is the Irish National Holiday. The Irish aren't too keen on the Scots due to the plantation (look it up).

Traditionally, the Irish treat it as a religious holiday and don't celebrate it the way it is celebrated in the US and UK.

Anyway, flying the Scottish flag is a bit insulting to the Irish. A personal example, I fly a British flag and play British national songs on US Independence day. I may fly a British flag on 4 July, but I am a true tory.

I am intentionally trying to be insulting.

I don't think you are intending to be insulting, but your behaviour could be interpreted as an insult.