I'm your Huckleberry.
-The directed strike in Syria was due to the violation of the Chemical Weapons Convention by Assad.
-They're only the same in that they're both dead. On average in the Vietnam War, it took about 50,000 rounds of ammunition to kill 1 enemy soldier. The numbers were similar for OIF/OEF. Conversely, 1 warhead of chemical weapons can rapidly kill multiple city blocks in an urban environment.
-You have 3 Trump arguments here which are pretty much all the same. However, this was the first time chemical weapons were used against innocent civilians since he has been in the seat and the most blatant use I can think of in quite a while. He acted accordingly. Trump remains opposed to a long protracted involvement in Syria and a quick, limited strike does nothing to change that.
-Trump is not completely indifferent to the plight of civilians in Syria. He does, however, put the safety of the American people above aimlessly letting in unscreened refugees.