Blether you are writing like I brought it up.  I didn't you did.  You said America was bad because they supported the IRA.  I was trying to explain to you how Americans felt about the IRA/THE IRISH WAR of Independence. 

The Black and Tans’ most notorious member must have been 19-year-old Thomas D. Huckerby from Somerset, England. Over a six-month period, he was responsible for the murder of five men – all of whom were unarmed and none of which were involved in the IRA.

On Nov. 26, 1920, IRA members Pat and Harry Loughnane were arrested at their family farm by Auxiliary forces. The brothers’ bodies were found burned and mutilated nine days later. They had been tied to the back of a lorry and forced to run behind it until they collapsed and were dragged along the ground. Both of Pat’s wrists, legs and arms were broken. He had a fractured skull and wounds carved into his chest. Harry’s right arm was broken and almost severed from his body, he was also missing two fingers. When he was found all that remained of his face were his chin and lips. Authorities claimed that the brothers had escaped from custody and that the Auxies were not involved in their deaths. That same month, a priest and a pregnant woman were also killed by British forces.

militaryhistorynow.com/2015/11/09/the-black-and-tan-war-nine-fascinating-facts-about-the-bloody-fight-for-irish-independence/

The Black and Tans were not subject to strict discipline in their first months and as a result, their deaths at the hands of the IRA in 1920 were often repaid with arbitrary reprisals against the civilian population. In the summer of 1920, the Black and Tans burned and sacked many small towns and villages in Ireland, beginning with Tuam in County Galway in July 1920 and also including Trim, Balbriggan, Knockcroghery, Thurles and Templemore amongst many others.

en.wikipedia.org/wiki/Black_and_Tans

You brought up the IRA and quid pro quo (I speak Latin - learned in Catholic school) I brought up the other side the Black and Tans to keep the discussion fair and balanced. 

The only thing I know about recruitment was most of them were out of work British WWI soldiers and recruited in England. 

 Of the 9,762 Black and Tans recruited a disproportionate number were from London and the counties immediately around London. (See Fig II) The reason for this was that the original recruiting was only carried out in London and it was easier for men in that area to get to the recruiting office and join up. It was not until July 1920 that recruiting began in other centres and eventually recruitment was carried out from regular British Army Recruitment offices. One striking feature about the recruitment of Black and Tans, which seems to have been missed by many academic commentators is the disproportionate number of recruits from Aberdeen. By any measure the total of 393 recruits is totally out of proportion to any where else. Another striking feature of Black and Tan recruitment was that only 117 men were recruited in the whole of Wales or 30% of the number recruited in Aberdeen.
1 London 2146
2 Lancashire 591
3 Ireland 299
4 Kent 331
5 Aberdeen 264
6 Lanarkshire 275
7 Yorkshire 262 
8 Middlesex 212
9 Surrey 210 
10 Sussex 145

Temps not listed. 
www.warofindependence.info/?page_id=505

Fing any ancient justifiction you like - the bottom line is that US citizens donated money to the IRA that caused carnage - and that your government gave sanctuary to murderers convicted in British courts.

Did you read the whole article?