[illumen]

If you can't provide any evidence, you're making it up.

[falcolas]

Or, he fears blacklisting in what is a closed market. The number of employees who have identical work histories is pretty slim; naming 2-3 of them would be very identifying.

I've seen this (job openings explicitly tailored for new or exisiting H1B employees) quite a bit myself, and I too am unwilling to "name names" for the same reason.

[LLWM]

Then there's no reason for anyone to take your concerns seriously.

[coddingtonbear]

Please do keep in mind that NDAs are a thing.