If you disagree with someone or disagree with what they say, you do not accept that what they say is true or correct. You can also say that two people disagree. 不同意; 有分歧
verb [vi. 不及物动词]有分歧,意见不合;不一致;不适宜,使……不舒服
You must continue to see them no matter how much you may disagree with them. 不管你与他们有多大分歧,都必须一如既往地去看他们。