There is a fundamental difference, in that Hinduism as a religion encompasses a plethora of philosophies, instead of one book/prophet/God. It is also much more liberating than Abrahmic religions.

Most of the criticism of Islam isn't due to religious complex, but legitimate historical precedent and the relative primal nature, as opposed to most other religions and cultures which have undergone reformations.

Moreover, Hindus as a group aren't seen as invading the personal space/cultures of Western world, at least by the right wing.

There are no calls for imposing "Hindu law", mostly because there is no monolithic Hindu law in the first place, but also due to most Hindu migrants being westernized, in contrast with Islam being seen as a threat to western way of life, both in US and Europe.