The phrase "although sympathetic" is correct and usable in written English.
It can be used to introduce a contrasting idea or to acknowledge a feeling of compassion while presenting a different perspective or opinion.
Example: "Although sympathetic to her situation, I believe that the decision must be made based on the facts."
Alternatives: "while understanding" or "even though compassionate".
Although sympathetic, I was in no position to help.
It did not reflect what I or my husband felt, but our celebrant, although sympathetic, couldn't remove it.
Although sympathetic activity is known to contribute to energy homeostasis, its predictive role in body weight maintenance has not yet been addressed.
Although sympathetic to their case, Wollaston wrote: "Pressing ahead with a full walkout, however, will serve only to harden attitudes and solves nothing.
Chatham – William Pitt – although sympathetic to the American colonies, has just had a fatal stroke while making a speech against granting them independence.
Only a year ago, America, although sympathetic to Georgia, was far more reticent.This American assertiveness leaves the EU struggling to decide how to react.
Although the sympathetic warden (Emile Meyer) agrees with their complaints, politicians refuse to support the changes.
Targets rarely appear before the grand jury, although a sympathetic target with a defense narrative will often choose to appear in a complex case.
Western countries, although largely sympathetic to the rebels, were reluctant to provide substantial military aid for fear that it would strengthen Sunni extremist groups within the rebellion.
A Toronto Star columnist, although somewhat sympathetic to Valizadeh's "thought experiment", reported in 2015 that only 34 men attended an address he gave in Montreal.
Although excessive sympathetic activation in viral myocarditis and the protective effects of sympathetic inhibition with β-blockers are clear, the effects of enhancing vagal tone on viral myocarditis remain unclear.
