And the top-ranked Americans did not hold back on the celebrations as they began defence of their world crown.
Among those questioning Rapinoe's methods of protest is her mother, Denise, who told Yahoo that when she and her husband first learned of the kneeling, "it was kind of shocking for us" and "we were pretty upset about that".
"We always want to have any world record and anything we can get over the Germans, we'll take it", Rapinoe said.
Kyle was one of three Canadians appearing as pundits on TSN to have blasted the defending world champions.
"As a Canadian we would just never ever think of doing something like that ..." I've seen much more disrespectful things happen on a football pitch. "Hats off to Thailand for holding their head high".
Rapinoe, who celebrated her team's ninth goal by sliding to the ground before leaping into the arms of the US substitutes on the sidelines, told Fox Sports she understood the criticism "in part", but defended her team mates. "This is the World Cup, not a rec league tournament", she wrote.
I said the exact opposite IT'S THE WORLD CUP! To take the most egregious example, in 40 years of watching men's soccer, I can't recall any celebration of a late goal in a rout that compares with Megan Rapinoe's over-the-top celebration of goal number nine, which you can watch here. However the team is under scrutiny for continuing to run up the score and excessive celebration with many critics calling their actions "disrespectful". "Everyone is allowed there [sic] opinions towards my thoughts 100 per cent but please leave the death threats!"
Thailand's deflated coach Nuengruethai Sathongwien said she had no excuses, adding: "We accept that they are better".
Fellow TSN analyst Clare Rustad, a former worldwide with 45 Canada caps, and veteran Canadian midfielder Diana Matheson, who is missing the tournament through injury, also criticized the American behaviour while noting the importance of goal differential. "I would have hoped they could have won with humility and grace but celebrating goals 8, 9, and 10 the way they were doing is really unnecessary".
"As part of the privilege to represent your country, we have an expectation that our players and coaches will stand and honor our flag while the national anthem is played".
American star Alex Morgan grabbed five goals while Rose Lavelle and Samantha Mewis netted twice each and Lindsey Horan, Megan Rapinoe, Mallory Pugh and Carli Lloyd also got on the scoresheet in the Group F encounter watched by more than 18,000.
Morgan and her teammates were criticized not so much for running up the score - after all, a coach can remove only three players, the US team is programmed to attack constantly and goal differential is the first tiebreaker at the end of the group stage - but for their goal celebrations.
Rapinoe's team played their first match in the tournament against Thailand on 11 June.
"We knew every goal could matter", Morgan said of a possible tiebreaker scenario with Sweden.
Hope Solo added to the controversy surrounding the USA win over Thailand.
Alex Morgan of the US celebrates scoring their twelfth goal with Megan Rapinoe.