These will deter NORMAL people. They won’t deter maniacal fanatical dirty-beard life members of the Cult of Death who are willing to hide explosives and/or chemicals anywhere on/in their body because they are so full of hate for Christians and Jews and self-loathing that they will gladly desecrate and destroy their bodies to bring about world wide sharia.
Is there anything that will deter people who are happy to strap explosives around their 6 year old children?
Quit sending them money.