FWIW, the official Dutch investigation into the situation makes no mention whatsoever to the sexual orientation of Dutch troops contributing in any way to what happened. The report can be found at:
NIOD - Srebrenica
A UN Newswire account of the Dutch commander's testimony during the Dutch inquiry also makes no mention of sexual orientation. That account can be found at:
Dutch Commander Faults U.N. For Srebrenica Massacre; More
In the end, General Sheehan provided no evidence to back up his assertions. The report following the inquiry found nothing to corroborate General Sheehan's assertions. No Dutch commander has backed his account. Instead, the Dutch have condemned his remarks.
IMO, the absence of corroborating evidence, the findings of the Inquiry into the massacre, the absence of confirmation from any Dutch military officials, and the swift and strong condemnation of Dutch political and military officials suggests that General Sheehan's account is inaccurate. Almost certainly, it is a matter of his personal speculation, only. As such, following outreach to the relevant Dutch officials (military and political), General Sheehan's testimony should be stricken from the record, as it provides no useful information for the Senate's work.