In a reflection of growing anxiety in Europe over the use of Islamic symbols, a committee of Belgian lawmakers voted Wednesday to ban the wearing of burqas in public, paving the way for the first clampdown of its kind on the Continent. The proposal, which will be put to the full Parliament after the Easter break, highlights the political sensitivity of Islamic dress for European politicians grappling with the challenges of integrating its expanding Muslim population. It came in the midst of debates in France and the Netherlands over the wearing of head scarves or veils, and followed a referendum vote in Switzerland against building minarets.