So let's see if I've got this right. You in-laws helped out tremendously after the birth of your baby. And obviously they are your husband's parents. But they have different opinions about things and are outspoken. And you don't want your children to be judgmental and intolerant, so you are going to judge and be intolerant of your husband's parents.
Here's what I would recommend. For the sake of your husband, your children's relationship with their grandparents, and ultimately your own marriage, I would urge emphasizing love and inclusiveness.
Explain your opinions to your in-laws and your kids, but respect theirs. Let gratitude and love win out over politics and differences. Grow in maturity as you exercise and expand on your own tolerance and ability to discover and nurture the best in people.