to go low contact with MIL?

[milissa]

Since having DD I can't overlook things as much. For example, MIL doesn't 'believe' in autism. When BIL had an affair, MIL decided it was SIL's fault for not paying BIL enough attention.

I don't want her around DD, because I don't want her shitty attitude to rub off. It feels like our morals/values don't align, which is massive to me. DH finds his DM difficult also.

AWBU to have minimal contact?

YANBU for you to go low contact but it is up to your DH to make the decision for him and your DD. Be supportive of what your DH wants it can be a really tough decision to reach the point of no/low contact with your own mum. It's not just your DH feelings on the matter it is how his extended family respond to his decision (it can be brutal).

She doesn't sound the nicest, would it be possible for your DH to be more involved with the contact with her so you don't have to deal with her as much? Realistically your DD will be more influenced by her home life than your MIL (I.e your good influence will win!), if anything your MIL will just be that relative that when the kids are older they make fun of their weird and outdated views!