The US does not have a society threatening problem with rape; the US did have a (somewhat) society threatening problem with false rape allegations, and I've personally been a victim of that.

The UK on the other hand does have a society threatening problem with with Muslim rape gangs (mainly Pakistani). In _that_ case, yes, it absolutely would be justified to reduce standards of due process to get the Muslims perpetrating that crime out of the UK. Although equally, the UK doesn't actually need to reduce due process standards by much to solve the problem: court cases have established beyond a reasonable doubt that a remarkably high percentage of the Pakistani Muslim population are rapists.