Here is a list of some by https://www.nspcc.org.uk/what-you-can-d ... alisation/" onclick="window.open(this.href);return false;
These are warning signs, and the question is, why would Muslim families rarely react to them or involve the authorities when they see these and clear indications even that something is not going right?
isolating themselves from family and friends
talking as if from a scripted speech
unwillingness or inability to discuss their views
a sudden disrespectful attitude towards others
increased levels of anger
increased secretiveness, especially around internet use.
Do you know any Muslims acting like that?
It is interesting that a disproportionate number of Muslims walking in that direction are recent converts... when the initial "love bombing" is over, and when they find they are often talked down to or treated with suspicion, they end up reading about of meeting the recruiters and one thing leads to another.
So if you have Muslim friends, watch for those signs... you may end up saving lives. Report what you see, if you are concerned, don't rely on others.
Even people like Zakir Naik is to most people merely a comical figure, an embarrassment, to some Muslims at least. He has in the past openly supported terror attacks and for that reason he is not allowed to enter an number of countries, the UK included. In India he is seen as dangerous too. A substantial number of convicted terrorists have quoted him as an inspiration.