You’re so close to getting it.
This is a police training issue and a blind to the problems government issue (the previous one and this one).
It is not the fault of the people who come to the country. The blame lies solely with police training and government mandates, and party with societies behaviour as a whole.
It is not an immigration issue.
You’ve mentioned small boats - nothing to do with Sikhs.
Illegal immigration - nothing to do with Sikhs.
hotel converted into quite uncomfortable dormitories - nothing to do with Sikhs.
But given your comment about luxury hotels, you are clearly extremely ill informed and this is simple, old fashioned racism rather than your opinions being formed by actual fact. Maybe get some of those facts. I’m sure you had no idea that the Sikh community had a different immigration history to the current economic migrants. I hope you’ve at least taken that on board.
I am not dismissing the issues of immigration; there are a lot, especially for those communities with huge numbers being housed for processing. But you really need to actually learn about it, starting with your false narrative that they stay in luxury hotels. Those hotels have been converted into dormitories to fit as many as possible - it is not luxury or comfortable. The meals are not luxury. They do not qualify for benefits or financial support beyond a small payment of £10 a week (this may have changed).
I assume you are an adult with a brain. Start using it. You can start with not mentioning immigrants again when talking about what happened to this boy.