に対(たい)してIn contrast to, While, In regard to, Whereas

に対(たい)する and に対(たい)して are two grammar patterns in Japanese that are regularly used to show when (B) is 'opposed to' or 'in contrast with' (A). 対(たい)する itself is a verb meaning 'to oppose'. Although this feeling of 'opposition' may be negative, in most circumstances, it just means 'toward' in the sense of targeting something.

に対(たい)する will be followed directly by a second noun, while に対(たい)して creates a pause in the sentence, before (B) will be explained in the second half of that sentence.

Fun Fact

Compared to に関(かん)して (another structure used to show how things 'relate' to each other), に対(たい)して focuses on (A) and (B) equally, explaining how those things interact, compare, or contrast each other.

Caution

As に対(たい)して strongly contrasts (A) and (B), this grammar structure will often be used to express differences between two things. This is very similar to 'whereas' in English.