Part of the issue with GM crops is the corporations involved, and how to operate them ethically under capitalism. The EU has a much stronger stance against capitalism run amok, than the US' does, so even if you do trust the science, the science doesn't operate in a vacuum. The EU understands this.
This is my main gripe with GMO those days. With GMO, the farmers effectively buy a one-year _license_ for a seed (SaaS-like) which can't be used in next years. Also there were stories of farmers going broke due to neighbors' GMO crops taking over their fields, and being sued for license breach.
We must find a way to bound the corporate greed with a good regulatory framework because GMO sooner or later might become inevitable.
