This is the failure in logic that ultimately convinced me the Railroad should not be trusted. Putting aside the "the ends justify the means" mentality of Desdemona (nuking children, seriously??) and the horrendously na?ve refusal to even acknowledge the potential threat to humanity that Synths could pose, the fact that their method of freeing a Synth involves killing the Synth boggles my mind.
The human equivalent would be the Railroad saying, "Hey, don't worry bud, we've got this awesome way for you to blend in. What we do is vaporise you and replace you with an identical clone who thinks it's someone else. Pretty neat huh?"
My response to that would probably not be printable but Synths are apparently queuing up for the procedure, which probably speaks volumes about the conditions at the Institute.
Also, does anyone else find it ironic that the Railroad, who argue that there should be no distinction between Synths and Humans, ultimately end up focusing on the one thing that makes Synths different; their ability to be reprogrammed.
I could get behind the Railroad a lot more if they helped Synths disguise themselves without the memory wipe. It wouldn't be that difficult to give Synths new identities and train them to blend in. But as it stands, they aren't freeing Synths, they are creating fake Humans. What's the point of freeing a synth if it just thinks it's a human? Hell, the BoS might even support the Railroad on this one; if every synth thought it was a human, their potential threat would be seriously diminished.
Ultimately the Railroad do not seem to realise that the only way to truly help synthetics as a race is to come out of the shadows and campaign for synths to be treated equally. By making them think they are human and sending them unwittingly into the general populace, they are only fanning the flames of fear and paranoia across the Commonwealth which is the main barrier to Synthetics being accepted.