LOL - fearmongering at its best supported by no facts at all.
Lets face it ... the best nutrition for babies is their mothers breast milk ... no need for A1 or A2 or whatever cows milk. Older children and grown ups need a balanced diet, and cow's milk offers a range of vitamins and other nutrients to get there, however - it is clearly not the only option to compile a balanced diet. There are many people who don't drink milk and have still a healthy and balanced diet. There are as well people who drink milk and have an unhealthy diet.
Just check healthline:
https://www.healthline.com/health/fo...llatti,-MS,-RD